ACROSS
1 Prize winner gets golden ring exchanged after initial refusal (5,8)
9 Migratory bird from 6 is returned to centre of perch (7)
10 Raise level of a GCSE pass (7)
11 The trunk contains a tonne approximately (5)
12 A drip almost paired up with staggering blonde in 8 tournament (9)
13 Skilfully captivates girl, acting thus? (8)
15 A former college professor studied chiefly coelenterates (6)
18 A measure of medicine after party is wise (6)
19 The Blues requires playing old instruments (8)
22,8 A general request to appear in court? (6,3,6)
24 A student member causes panic (5)
25 Greek character in a spot with height indicates part of horizon (7)
26 One chanting in male voice, misplacing vowels (7)
27 Removes all complexities from unfinished diary scientist scribbled (12)
DOWN
1 Victorious at 12 in 1998 after Antonov exploded (7)
2 See 16
3 Give money to German for game (5)
4 A strong rising tide submerging Henry's animal (7)
5 Regions about to be given aid (6)
6 Cake eaten by Gabriel? (5-4)
7 One leaves Daniel frolicking with antelope (5)
8 See 22
14 Legendary seamen have a gas with heartless relatives (9)
16,2 "Surely you jest?" famously heard at 12 – you see ban on court is a possible outcome (3,3,3,2,7)
17 Attendant at 12? (8)
18 Tense situations arising when Mum's relocated in Indian city (6)
20 Girl's taking on politician victorious at 12 in 1998 (7)
21 Hound a citizen (6)
23 It was once torn apart in year 506 uprising (5)
24 A lofty Greek? (5)
