Good man Joker — not the first one getting you heated? (6)
I believe the answer is:
stoker
'one getting you heated?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'good man joker not the first' is the wordplay.
'good man' becomes 'st' (abbreviation for saint).
'not the first' means to remove the first letter.
'joker' with its initial letter removed is 'oker'.
'st'+'oker'='STOKER'
Can you help me to learn more?
(Other definitions for stoker that I've seen before include "Bram - - , Dracula author" , "Furnace man" , "He created a vampire" , "author of scary stories" , "One fuelling the fire" .)