Energetic turns - detectives include several (7)
I believe the answer is:
dynamic
'energetic' is the definition.
(associated in meaning)
'turns detectives include several' is the wordplay.
'turns' shows that the letters should be reversed in order.
'detectives' becomes 'CID' (abbreviation for Criminal Investigation Department).
'include' indicates putting letters inside.
'several' becomes 'many' (I've seen this in another clue).
'cid' going around 'many' is 'cimanyd'.
'cimanyd' written backwards gives 'DYNAMIC'.
(Other definitions for dynamic that I've seen before include "Vigorous and effective" , "Forceful" , "Full of energy and ideas" , "Driving" , "Go-getting" .)