Crossword Genius

Cleaner bizarrely dug his in-law quip (7-2,6)

Ross

I believe the answer is:

washing-up liquid

'cleaner' is the definition.
(liquid used to clean things)

'bizarrely dug his in-law quip' is the wordplay.
'bizarrely' indicates an anagram.
'dug'+'his'+'in'+'law'+'quip'='dughisinlawquip'
'dughisinlawquip' is an anagram of 'WASHING-UP LIQUID'.

I've seen this clue in The Guardian.
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