Crossword Genius

Most of all, to become a singer (4)

Ross

I believe the answer is:

alto

'a singer' is the definition.
(alto is a kind of singer)

'most of all to' is the wordplay.
'most of' means to remove the last letter.
'all' with its final letter taken off is 'al'.
'al'+'to'='ALTO'

'become' acts as a link.

(Other definitions for alto that I've seen before include "High male singing voice" , "Kind of singing voice, male or female" , "Low female singing voice" , "Member of choir" , "Key old > male who scores high" .)

I've seen this clue in the Evening Standard.
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