21 across
Picture
police
build
up
of
one
kitten
I’d
mistreated
(9)
Picture police build up of one kitten I’d mistreated (9)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
Look at Picture police build up — that's your definition, describing exactly what an identikit is. For the wordplay, take 'one' giving you I, then KITTEN, then I'D, and anagram the whole lot — that's your hint from 'mistreated' — to get your answer.