Groom's hot stuff (5)
I believe the answer is:
curry
This clue is a double definition.
'groom's' is the first definition.
(synonyms)
'hot stuff' is the second definition.
(type of hot dish)
(Other definitions for curry that I've seen before include "groom" , "Scratch" , "Vindaloo, for example" , "Pungent Indian dish" , "Indian-style dish" .)