clink or cooler (4)
I believe the answer is:
jail
I believe this clue is a double definition.
'clink' is the first definition.
(I know that clink can be written as jail)
'cooler' is the second definition.
(I've seen this before)
(Other definitions for jail that I've seen before include "sentence" , "Clink" , "detention" , "Gaol" , "Nick" .)