Crossword Genius

Chap called after girl, one amused by a drunk (1,3,5,3)

Ross

I believe the answer is:

a boy named sue

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'chap called after girl' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'one amused by a drunk' is the wordplay.
'drunk' indicates anagramming the letters.
'one'+'amused'+'by'+'a'='oneamusedbya'
'oneamusedbya' with letters rearranged gives 'A BOY NAMED SUE'.

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I've seen this clue in The Irish Times.
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