Let heir vomit violently, having drunk too much (4,3,5)

I believe the answer is:

over the limit

'having drunk too much' is the definition.

'let heir vomit violently' is the wordplay.
'violently' indicates an anagram.
'let'+'heir'+'vomit'='letheirvomit'
'letheirvomit' anagrammed gives 'OVER THE LIMIT'.

I've seen this clue in The Guardian.

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