Cover thrown over hot fellow (4)
I believe the answer is:
chap
'fellow' is the definition.
(both can mean a man)
'cover thrown over hot' is the wordplay.
I cannot really understand how this works, but
'hot' could be 'h' (abbreviation eg on taps) and 'h' is located in the answer.
'cover' could be 'cap' (cap is a kind of cover) and 'cap' is present in the leftover letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for chap that I've seen before include "Become sore; fellow" , "Man, sore patch" , "Cracked skin patch caused by cold" , "Fellow < makes > crack" , "Man; (of skin) turn sore" .)