Complained at being put in drain (7)

I believe the answer is:

bleated

'complained' is the definition.
(bleating is a kind of complaining)

'at being put in drain' is the wordplay.
'being put in' means one lot of letters goes inside another.
'drain' becomes 'bleed' (bleeding is a kind of draining).
'at' placed inside 'bleed' is 'BLEATED'.

I've seen this clue in The Independent.

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