One more alto? Anyone but that woman (7)

I believe the answer is:

another

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'one more alto? anyone but that woman' is the definition.
'another' can be an answer for 'one more' (another means one more). I'm unsure of the remainder of the definition.

'one more' is the wordplay.
'one' becomes 'an' (an apple is one apple).
'more' becomes 'other' (synonyms).
'an'+'other'='ANOTHER'

Can you help me to learn more?

(Other definitions for another that I've seen before include "encore?" , "A different one" , "Somebody else" , "second" , "Player or person not yet named or selected" .)

I've seen this clue in The Independent.

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