Crossword Genius

Miss an opportunity to make couture restorative (7)

Ross

I believe the answer is:

loseout

'an opportunity to make couture restorative' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'miss' is the wordplay.
I cannot quite understand how this works, but
'miss' could be 'lose' (I've seen this in other clues) and 'lose' is found in the answer.
The remaining letters 'out' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

I've seen this clue in The Guardian.
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