Awesome, ace, flawless person making a comeback (4)
I believe the answer is:
mega
'awesome ace' is the definition.
'mega' can be an answer for 'ace' (I've seen this before). I am unsure of the 'awesome' bit.
'flawless person making a comeback' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
The remaining letters 'meg' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for mega that I've seen before include "Game (anag) - excellent" , "Huge (slang)" , "Terrific" , "Smashing" , "Informally great or large" .)