Police officer gets bad review (6)
I believe the answer is:
digest
'review' is the definition.
(thesaurus)
'police officer gets bad' is the wordplay.
'police officer' becomes 'DI' (detective inspector).
'bad' indicates anagramming the letters.
'gets' anagrammed gives 'gest'.
'di'+'gest'='DIGEST'
(Other definitions for digest that I've seen before include "Absorb, in stomach or mind" , "Abridgement" , "Absorb, food or information" , "Collection of shortened versions" , "Take in - collected rules of laws" .)