Constellation with a belt (5)
I believe the answer is:
orion
'constellation with a belt' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for orion that I've seen before include "Group in heaven" , "Major constellation" , "His belt is in the heavens" , "Mythical great hunter" , "Greek hunter became a constellation" .)