Crossword Genius

Bit of a catastrophe, but it puts an edge on things (5)

Ross

I believe the answer is:

strop

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'it puts an edge on things' is the definition.
The definition suggests a singular noun which matches the answer.

'bit of a catastrophe but' is the wordplay.
'bit of' indicates the answer is hidden within the clue.
'STROP' can be found hidden inside 'catastrophe but'.

Can you help me to learn more?

(Other definitions for strop that I've seen before include "Strip of leather on which razor is sharpened" , "Sharpen on piece of leather" , "Bad mood; sharpen" , "Display of temper" , "Piece of leather on which razor is sharpened" .)

I've seen this clue in the Evening Standard.
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