Crossword Genius

Champion boxer with a second assumed name (5)

Ross

I believe the answer is:

alias

'assumed name' is the definition.
(synonyms)

'champion boxer with a second' is the wordplay.
'champion boxer' becomes 'Ali' (Muhammad Ali).
'with' says to put letters next to each other.
'second' becomes 's' (common abbreviation).
'ali'+'a'+'s'='ALIAS'

(Other definitions for alias that I've seen before include "another name" , "False identity" , "False or assumed name" , "Assumed identity" , "Otherwise - an assumed name" .)

I've seen this clue in The Times.
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