Hot person’s pullover (7)
I believe the answer is:
sweater
'pullover' is the definition.
(I've seen this before)
'hot person's' is the wordplay.
I cannot quite see how this works, but
'person' could be 'eater' (eater is a kind of person) and 'eater' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for sweater that I've seen before include "A present from Mum!" , "Knitted upper garment" , "One visibly too hot" , "Long-sleeved pullover" , "Jumper (7)" .)