Cult ready to get caught (4)
I believe the answer is:
sect
'cult' is the definition.
(I've seen this before)
'ready to get caught' is the wordplay.
'ready to' becomes 'set' (synonyms).
'get' means one lot of letters goes inside another.
'caught' becomes 'c' (cricket abbreviation).
'set' placed around 'c' is 'SECT'.
(Other definitions for sect that I've seen before include "Denomination" , "Group, faction" , "party" , "Body of followers" , "Subdivision of a religion" .)