Muscle complaint (4)

I believe the answer is:

beef

This clue is a double definition.

'muscle' is the first definition.
(I've seen this before)

'complaint' is the second definition.
(beef can mean a complaint or objection)

(Other definitions for beef that I've seen before include "Muscle; meat; grievance" , "Grouse - meat" , "Complain; meat" , "Grumble - muscle" , "Complaint; muscle" .)

I've seen this clue in The Sun and The Independent.

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