Starred clues have no definition but share a common theme
Across
6 Adult got thrashed, hence distressed (7)
7 * Spirit, bordering on crazy, is guarding gold (7)
9 * Most of dance party is about to move indoors (5)
10 * Décor Ian derived on display (9)
11 Once again publish using printer (7)
13 Ill boy is being treated. All get out! (6)
15 Maniac cop, nude, running all alone (13)
19 Could be you or me — lonely, without love around New York (6)
20* Shakespearean character wears spectacles (7)
23 See a thumbs up on Facebook for a celebrity impersonator (4-5)
24 Rule to implement before exam time runs out (5)
26 Cola and rum cocktail caused racket (7)
27 Replace income (7)
Down
1 Stand in Grenada isle (4)
2* Sound American nation (6)
3 To a dunce I relay instructions (9)
4 Best tax provided to be revoked. This is mania! (8)
5 I’ll order accountant to build a range (10)
6 Colour seen when bureau burns (6)
7 Crop that’s old-fashioned (4)
8 * Brief story on war (6)
12* Pony nearly beaten up (10)
14 Branch of medicine that has visionaries? (9)
16* Commit a crime as discussed on a weekday (8)
17* A protective charm against vampires (6)
18* Bread stuffed with gold is finally stolen (6)
21* Go up at a corner, then go down (6)
22 Rank first in TOEFL and IELTS, second in JEE and GRE (4)
25 Hereditary unit is produced but not evaluated (4)