Italian city dweller coming back from Vietnam originally (5)
I believe the answer is:
roman
'italian' is the definition.
(someone from Rome)
'back from vietnam originally' is the wordplay.
'back' says the letters should be written backwards.
'from' indicates a hidden word.
'namor' is hidden in the letters of 'vietnam originally'.
'namor' reversed gives 'ROMAN'.
'city dweller coming' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for roman that I've seen before include "eg Brutus" , "Classical" , "- Catholic; - candle" , "Of an Italian city" , "A novel" .)