Runs in a ringleader, then takes it easy (7)
I believe the answer is:
arrests
'runs in' is the definition.
(I've seen this in another clue)
'a ringleader then takes it easy' is the wordplay.
'ringleader' becomes 'r' (first letter of ring).
'then' is a charade indicator (letters next to each other).
'takes it easy' becomes 'rests' (I've seen this in another clue).
'a'+'r'+'rests'='ARRESTS'
(Other definitions for arrests that I've seen before include "has a heart attack" , "Checks" , "made by police" , "Apprehends" , "Seizes and takes into custody" .)