After alcohol, kiss boy or girl (4)

I believe the answer is:

alex

'boy or girl' is the definition.
(unisex name)

'after alcohol kiss' is the wordplay.
'after' says to put letters next to each other.
'alcohol' becomes 'ale' (ale is a kind of alcohol).
'kiss' becomes 'x'.
'ale' put next to 'x' is 'ALEX'.

(Another definition for alex that I've seen is " Sandy".)

I've seen this clue in The Times.

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