Grouse and cattle reared for their meat (4)
I believe the answer is:
beef
'grouse' is the definition.
(synonyms)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for beef that I've seen before include "See 24" , "Strength - grievance" , "Complaint; strength" , "Muscle; meat; grievance" , "Brawn; complaint" .)