Police officer's drama show (7)
I believe the answer is:
display
'show' is the definition.
(display is a kind of show)
'police officer's drama' is the wordplay.
'police officer's' becomes 'di's' (detective inspector).
'drama' becomes 'play' (synonyms).
'dis'+'play'='DISPLAY'
(Other definitions for display that I've seen before include "Put on show" , "Place on show" , "Show to the public" , "Reveal" , "Exhibition" .)