What a barber might have in a bistro, perhaps (5)

I believe the answer is:

strop

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'what a barber might' is the definition.
I can't tell whether this defines the answer.

'in a bistro perhaps' is the wordplay.
'in' indicates the answer is hidden within the clue.
'STROP' is hidden within 'bistro perhaps'.

'have' is the link.

Can you help me to learn more?

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

I've seen this clue in the Evening Standard.

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