Crossword Genius

Attack the vessel going in, not out

Ross

I think it could be either:

Which length description are you looking for?:

4,2

6*

turnon

'attack' is the definition.
(thesaurus)

'the vessel going in not out' is the wordplay.
'the vessel' becomes 'urn' (urn is a kind of vessel).
'going in' indicates putting letters inside.
'out' indicates an anagram (out can mean wrong or inaccurate).
'not' anagrammed gives 'ton'.
'urn' placed within 'ton' is 'TURN-ON'.

I've seen this clue in the Evening Standard.
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