Cooler room? (4)
I believe the answer is:
cell
'cooler room?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cell that I've seen before include "Chamber" , "Prisoner's or monk's room" , "Small room for nun, monk or prisoner" , "Place of incarceration or unit of living matter" , "American mobile" .)