Use a spoon to make cooler? (4)
I believe the answer is:
stir
I believe this clue is a double definition.
'use a spoon' is the first definition.
(I've seen this in another clue)
'cooler?' is the second definition.
(both are slang terms for prison)
'to make' acts as a link.
(Other definitions for stir that I've seen before include "Disturb" , "Rouse; prison (colloq.)" , "Prison - mix" , "Ladies' underwear" , "fuss" .)