Crossword Genius

Whistler's property? (3)

Ross

I believe the answer is:

his

I'm a little stuck... Click here to teach me more about this clue!

'property?' is the definition.
Although both the answer and definition are nouns, they are not in the same form of the noun.

'whistler's' is the wordplay.
'HIS' is hidden within the letters.
But, I am uncertain how the hidden word is indicated.

Can you help me to learn more?

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

I've seen this clue in the Evening Standard.
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