Crossword Genius

Amend misbehaving nun with crew cut? (8)

Ross

I believe the answer is:

unmanned

I'm a little stuck... Click here to teach me more about this clue!

'cut?' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

'amend misbehaving nun with crew' is the wordplay.
I cannot really see how this works, but
'crew' could be 'man' (both can mean to staff or operate something) and 'man' is found in the answer.
an anagram of 'nun' is 'unn' which is present in the left over letters.
The remaining letters 'ed' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for unmanned that I've seen before include "Without staff or personnel - made weak" , "Like a drone" , "Lacking personnel" , "Needing no crew" , "Weakened the courage of in male way" .)

I've seen this clue in The Irish Times.
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