Across:
1 Evaluate (ASSESS) local fool’s (ASSES-) silver to begin with (‘silver’ to begin with = -S) (ASSESS),
4 Ray’s (SUN-) Bar (-BLOCK) (SUNBLOCK) restricts those feeling the heat (SUNBLOCK),
9 One way of looking with difficulty (MYOPIC) at my (MY-) old (-O-) photograph (-PIC) (MYOPIC),
10 Just a red (just a red = READJUST) dress (= anagram indicator) produced by tailor again (READJUST),
12 The latest word (NEWS-) on musicians (-GROUP) (NEWSGROUP) is open to discussion (NEWSGROUP),
13 Put a line through (ERASE) some disclaimer as expected (some ‘disclaimer as expected’ = ERASE),
14 Dead Sea for instance (SALT LAKE), close to Jerusalem (CITY) (SALT LAKE CITY), is a place where you’ll find a fair amount of Mormons (SALT LAKE CITY),
18 Is indifferent (UNINTERESTED) to organisation (United Nations = UN-) showing concern (-INTERESTED) (UNINTERESTED),
21 Sexist (sexist = EXISTS) boss (= anagram indicator) hasn’t gone away (EXISTS),
22 It’s sublime (CELESTIAL) for the Spanish (the = -EL-) in Castile (Castile = C-ESTIAL) resort (= anagram indicator) (CELESTIAL),
24 Unlawful (CRIMINAL) power taken away from imperial crown (‘power’ taken away from ‘imperial crown’ = CRIMINAL),
25 Alternative (= anagram indicator) to most (to most = MOTTOS) saws (saws/proverbs = MOTTOS),
26 His dream (his dream = MISHEARD) move (= anagram indicator) is picked is up the wrong way (MISHEARD)
27 Oscar (O-) is cross (-X-) with peer group perhaps (-EYES) (OXEYES) and some of those from Daisy’s family (members of the Daisy family = OXEYES).
Down:
1 Rebuke (ADMONISH) Danish (Danish = AD-NISH) novel (= anagram indicator) about The Mafia (mob) briefly (b) (‘mob’ without ‘b’ = -MO-) (ADMONISH),
2 Come across (SPOT-) lewd (lewd = -WELD) dance (= anagram indicator) (SPOT-WELD) from working men’s joint (SPOT-WELD),
3 It’s an irritation (STING) sitting it out (‘sitting’ ‘it’ out = sting = STING),
5 Out of the blue (UNEXPECTEDLY), organisation (United Nations = UN-) is due to arrive (-EXPECTED-) with what’s central to analysis (central to ‘analysis’ = -LY) (UNEXPECTEDLY),
6 Partner close to board (BED and board) is ready to go (SET-) to swinger’s aid? (-TEE) (BED SETTEE) I’d sleep on it, if I were in someone else’s house! (BED SETTEE),
7 Comic (jocular) loses the head (j) (‘jocular’ without ‘j’ = OCULAR) – it’s to do with the viewers? (OCULAR),
8 Small foxy type (KITTEN) of gear (KIT-) is half rotten (half ‘rotten’ = -TEN) (KITTEN),
11 Mythical bird (ROC-), penguin (-KING penguin) and a rich (a rich = CHAIR) flighty (= anagram indicator) (ROCKING CHAIR) type going back and forth on the American porch (ROCKING CHAIR),
15 Comes down (LANDS-) to Cork (-LID-) from far side of Clare (far side of ‘Clare’ = -E) (LANDSLIDE) for earthmover (LANDSLIDE),
16 No exceptions (STRICTLY) to firm (STRICT-) line (-L-) taken by foundation (‘by’ foundation = -Y) (STRICTLY),
17 Admires (IDOLISES) one (I-) party (-DO-) on Isle (Isle = -LISE-) confusing (= anagram indicator) head of state (head of ‘state’ = -S) (IDOLISES),
19 Network (WEB-) mostly (p) for soldiers (“camp” without ‘p’ = -CAM) (WEBCAM) bringing others to view the site (WEBCAM),
20 Channel Islands’ (CI-) connections (-TIES) (CITIES) to London and Paris (CITIES),
23 Tribe (SIOUX) from Verona left overanxious (‘Verona’ left ‘overanxious’ = xious = SIOUX).