A lot among police turning forceful? (7)
I believe the answer is:
dynamic
'forceful?' is the definition.
('dynamic' can be similar in meaning to 'forceful')
'a lot among police turning' is the wordplay.
'a lot' becomes 'many' (**).
'among' indicates putting letters inside.
'police' becomes 'cid'.
'turning' says the letters should be written in reverse.
'many' inserted into 'cid' is 'cimanyd'.
'cimanyd' reversed gives 'DYNAMIC'.
(Other definitions for dynamic that I've seen before include "Having power" , "I'm Candy (anag) - full of beans" , "Forceful" , "Powerful and vigorous" , "Very active" .)