He makes things hot for people (5)
I believe the answer is:
baker
'he makes things hot for people' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'he' is the wordplay.
I cannot really understand how this works, but
'he' could be 'ker' and 'ker' is present in the answer.
The remaining letters 'ba' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for baker that I've seen before include "One who makes bread" , "His 12 is13" , "one with lots of dough" , "His 12 is 13" , "Bread and cakes maker" .)