Cool down (5)
'cool down' is the definition.
(synonyms)
This is all the clue.
(Other definitions for chill that I've seen before include "Refrigerate" , "A feeling of coldness" , "Unpleasent coldness in the air" , "Preserve by cold" , "Slang injunction to relax - it's cold" .)
'cool down' is the definition.
(refrigerating is a kind of cooling down)
This is all the clue.
(Other definitions for refrigerate that I've seen before include "Keep (food or drink) cold" , "Provide cooling" , "Cool!" , "Freeze" , "Chill" .)