Rotten police bust outside North Carolina (6)
I believe the answer is:
rancid
'rotten' is the definition.
(I've seen this in another clue)
'police bust outside north carolina' is the wordplay.
'police bust' becomes 'raid' (I've seen this in another clue).
'outside' is an insertion indicator.
'north carolina' becomes 'nc' (this might be a standard abbreviation of which I'm unaware).
'raid' going around 'nc' is 'RANCID'.
Can you help me to learn more?
(Other definitions for rancid that I've seen before include "(Of fatty foods) gone off" , "Sour - smelling bad" , "Smelly and going bad" , "Smelling or tasting bad" , "(Of fat/oil) stale and foul smelling" .)