Nutty product of police officer and artist (5)
I believe the answer is:
copra
'nutty product' is the definition.
(I've seen this before)
'police officer and artist' is the wordplay.
'police officer' becomes 'cop' (cop is a kind of police officer).
'and' is a charade indicator (letters next to each other).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'cop'+'ra'='COPRA'
'of' is the link.
(Other definitions for copra that I've seen before include "bit of a nut" , "Dried coconut meat" , "Dried cocoa-nut kernels, source of oil" , "source of oils" , "Dried coconut kernels" .)