Organised group that chases criminals off (6)
I believe the answer is:
rancid
'off' is the definition.
(I've seen this before)
'organised group that chases criminals' is the wordplay.
I cannot really see how this works, but
'organised' could be 'ran' (run can mean to manage or organise) and 'ran' is found within the answer.
The remaining letters 'cid' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for rancid that I've seen before include "Smelling or tasting of stale fat" , "Smelly and going bad" , "Sour like stale grease 96)" , "Putrid" , "Rank-smelling." .)