Crossword Genius

Identity of female man may lie about? (6,4)

Ross

I believe the answer is:

family name

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

'identity' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'female man may lie about?' is the wordplay.
'female' becomes 'f' (abbreviation).
'about?' indicates anagramming the letters (I've seen 'about' mean this).
'man'+'may'+'lie'='manmaylie'
'manmaylie' with letters rearranged gives 'amilyname'.
'f'+'amilyname'='FAMILY NAME'

'of' acts as a link.

Can you help me to learn more?

I've seen this clue in The Hindu.
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