Lets off steam (5)
'lets off steam?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cools that I've seen before include "Chills" , "Becomes less ardent" , "Gets colder" , "Loses heat" .)
'lets off steam' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Another definition for vents that I've seen is " Escape holes for gas or air".)