Crossword Genius

Weaken nun - wise move (7)

Ross

I believe the answer is:

unsinew

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'weaken' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'nun wise move' is the wordplay.
'move' indicates an anagram.
'nun'+'wise'='nunwise'
'nunwise' is an anagram of 'UNSINEW'.

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I've seen this clue in The Independent.
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