Common sense, to a point, is not worth the effort (5)

I believe the answer is:

nouse

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'not worth the effort' is the definition.
I know nothing about this answer so I can't judge whether this works.

'common sense to a point' is the wordplay.
'common sense' becomes 'nous' (nous is a kind of common sense).
'to a point' becomes 'e' (compass point).
'nous'+'e'='NOUSE'

'is' acts as a link.

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I've seen this clue in The Daily Express.

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