Across:
8 Wild (= anagram indicator) acid (acid = -ICAD-) in California (C-A) (CICADA) produced by a noisy, chirpy type (CICADA),
9 Iris (EYEPIECE) is a bit of a looker (EYEPIECE),
10 Something stuck in trachea (something stuck in ‘trachea’ = ACHE) can be a pain (ACHE),
11 Shakespeare (Will) needs no introduction (w) (‘Will’ without ‘w’ = ILL-) to the writer (-ED) behind Romeo and Juliet (MATCH-) (ILL-MATCHED) – how incongruous is that? (ILL-MATCHED),
12 Jumped-up (SPRANG) biker gets out of spring break (‘biker’ gets out of ‘spring break’ = sprnga = SPRANG),
14 Talked over difficulty (OPENED UP) of old (O-) writer (-PEN-) joining English (-E-) party up north (Democratic Unionist Party = -D UP) (OPENED UP),
15 What do you expect The Joker to do (PULL SOMEONE’S LEG) in jest? (PULL SOMEONE’S LEG),
18 A (A-) crafty (= anagram indicator) hamper (hamper = -MPH-RAE) contains old (-O-) (AMPHORAE) types of jars (AMPHORAE),
20 Victor (V-) English (-E-) from Takeaway (take away/less = -SSEL) turns up (= reversal indicator) (VESSEL) carrying the fish (VESSEL),
22 A foreign (a = UN-) sauce (-DRESSING) (UNDRESSING) is taking off (UNDRESSING),
24 Mental acuity (WITS) and limits to William Butler Yeats (limits to ‘William Butler Yeats’ = WITS),
25 Weekend (‘week’ end = K-) at side of (-EDGE-) lough (Lough -REE) (KEDGEREE) with dishy type (KEDGEREE),
26 Bar (TAVERN) shady type (TA-N) over sending up (= reversal indicator) father (Rev = -VER-) (TAVERN).
Down:
1 Caught (-C-) copper (-CU-) cutting joint (hip joint = HI-P) (HICCUP) – it’s a minor setback (HICCUP),
2 Fury (RAGE) internalised by suffragette (internalised by ‘suffragette’ = RAGE),
3 Coping (Orange) with what one is expected to sleep on (-KING size-bed) in absurd (MA- D) order (-O) (MAKING DO),
4 Stroke (FEEL) by some backsliding (= reversal indicator) Tralee family (‘Tralee family’ = leef = FEEL),
5 In retrospect (= reversal indicator), writer (ed = D-E) goes around eatery (café = -EFAC-) (DEFACE) with Sully (sully/damage = DEFACE),
6 Important people (BIG CHEESES) with enormous wheels perhaps (enormous wheels of cheese = BIG CHEESES),
7 She clued (she clued = SCHEDULE) puzzle (= anagram indicator) to plan (SCHEDULE),
13 Lethal (lethal = ALL THE) novel (= anagram indicator) by 2 down (‘rage’ = RAGE) (ALL THE RAGE) in Vogue (ALL THE RAGE),
14 Really big (OBESE) Fords removed from bed of roses (‘Fords’ removed from ‘bed of roses’ = beose = OBESE),
16 A French (a = UN-) way of acting (manner) curtailed (r) (‘manner’ without ‘r’ = -MANNE-) by director (-D) (UNMANNED) having no crew (UNMANNED),
17 Direct a course (NAVIGATE) for vain (vain = NAVI-) model (= anagram indicator) joining theatre (The -GATE) (NAVIGATE),
19 Store (store = RESO-T) scheme (= anagram indicator) covers reading (from the 3Rs = -R-) (RESORT) option for those going on holiday (RESORT),
21 Extract (EXTORT) found in Tex-Mex tortellini (“Tex-Mex tortellini” = EXTORT),
23 Covers the bun (ICES the bun) with a slice of Red Leicester (a slice of ‘Red Leicester’ = ICES),
24 Roller (WAVE) for wallpaper adhesive on the borders (for ‘wallpaper adhesive’ on the borders = WAVE).