Limp young creature turning on policemen (7)
I believe the answer is:
flaccid
'limp' is the definition.
(synonyms)
'young creature turning on policemen' is the wordplay.
'young creature' becomes 'calf' (calf is a kind of animal. I am not sure about the 'young' bit.).
'turning' is a reversal indicator.
'on' says to put letters next to each other.
'policemen' becomes 'CID' (abbreviation for Criminal Investigation Department).
'calf' backwards is 'flac'.
'flac'+'cid'='FLACCID'
Can you help me to learn more?
(Other definitions for flaccid that I've seen before include "Limp, flabby" , "Floppy" , "Lax" , "Limp and soft" , "Droopy" .)