Crossword Genius

The sophisticated fellow's property (3)

Ross

I believe the answer is:

his

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'the sophisticated fellow's' is the definition.
'his' can be an answer for 'fellow's' (belonging to a man). I am not certain of the 'the sophisticated' bit.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for his that I've seen before include "That man's" , "To - Coy Mistress (Marvell)" , "It belongs to him" , "Belonging to that man" , "that chap's" .)

I've seen this clue in the Evening Standard.
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