Across:
8 Turns up (= reversal indicator), the foreign (the = le = -EL) credit (cr = -RC-) application (app), for the most part (‘app’ without ‘p’ = ap = PA-) (PARCEL), is in the post (PARCEL),
9 State (VOICE) television (BOX) (VOICE BOX) is responsible for speech (VOICE BOX),
10 Describe a nutritional fragment (‘describe a nutritional fragment’ = BEAN) in the coffee-making process (BEAN),
11 Hopes for spring? (hopes/wishes for spring/well = WELL-WISHER?) Good luck with that! (WELL-WISHER)
12 Miraculously drops royal’s (‘miraculously’ drops ‘royals’ = micuul = CUMULI) gathering on a dull day (CUMULI clouds),
14 The latest trend (fashionable/trendy = IN-) – brief (r) romantic (‘tender’ without ‘r’ = -TENDE) date (-D) (INTENDED) with fiancée (INTENDED),
15 Irish Catholic Church (CHURCH OF IRELAND) preaches to Anglicans here? (CHURCH OF IRELAND),
18 It’s an utter failure (DISASTER) to set-up (= reversal indicator) Sidney (Sid = DIS-) with Daisy’s relative (-ASTER) (DISASTER),
20 Director (-D-) consumed by silly (silly = I-YLLS) play (= anagram indicator) (IDYLLS) produced a number of pastoral scenes (IDYLLS),
22 It’s easy to understand (CLEAR AS DAY) you’d never find this much clarity in the dark (CLEAR AS DAY),
24 Some eccentric – a vegetarian (some ‘eccentric – a vegetarian’ = CAVE) left holding the wine (CAVE),
25 Cunard ship, for example? (ONE LINER) Is that meant to be funny! (ONE-LINER),
26 Gives out (ALLOTS) to everyone (ALL-) with old books (Old Testament = -OT-) at school (-S) (ALLOTS).
Down:
1 Cake (GATEAU) in front of gourmet (front of ‘gourmet’ = G-) to go with a (-A-) drink (-TEA-) that needs topping-up (topping ‘up’ = -U) (GATEAU),
2 Celebrity (ICON) is charged (I-ON) over possession of cocaine (-C-) (ICON),
3 Like the comedian (CLOWNISH), his (his = -ISH) mistake (= anagram indicator) is following (= positional indicator) entertainer from Ring (entertainer from circus ring = CLOWN-) (CLOWNISH),
4 Sinister (EVIL) part of vaudeville (part of ‘vaudeville’ = EVIL),
5 Fool (NITWIT) with identical twin dismisses nice lad (‘identical twin’ dismisses ‘nice lad’ = intitw = NITWIT),
6 According to my way of thinking (PERSONALLY), fellow (PERSON-) is one of those in The Confederacy (-ALLY) (PERSONALLY),
7 There’s no regatta in Orange Free State (no ‘regatta’ in ‘Orange Free State’ = prmefese = FORESEEN) as predicted (FORESEEN),
13 It’s not easy to understand (UNREADABLE), this is as clear (-READABLE) to organisation (UN-) from the start (= positional indicator) (UNREADABLE),
14 Work out (INFER) for certain, actor is missing (‘for certain’ without ‘actor’ = ferin = INFER),
16 Hothead (‘hot’ head = H-) at United, for example (United Airlines = -AIRLINE) (HAIRLINE), is found up top (HAIRLINE),
17 Reason to save (RAINY DAY) for what’s been forecasted (RAINY DAY),
19 Public transport (TRAINS) in Elbe coming out of East Berlin (‘Elbe’ coming out of ‘East Berlin’ = astrin = TRAINS),
21 Tax (LEV-Y) covering information technology (-IT-) (LEVITY) and high spirits (LEVITY),
23 Sort of similar is to one of those in 19 down (similar is to one of the “trains” = DART) in Rush (DART),
24 Relax (CALM) with some physical medicine (some ‘physical medicine’ = CALM).