Beef good and ready to eat (5)
I believe the answer is:
gripe
'beef' is the definition.
('gripe' can be a synonym of 'beef')
'good and ready to eat' is the wordplay.
'good' becomes 'g' (abbreviation).
'and' says to put letters next to each other.
'ready to eat' becomes 'ripe' (I've seen this before).
'g'+'ripe'='GRIPE'
(Other definitions for gripe that I've seen before include "carp" , "Trivial complaint" , "Grievance" , "Complain; colic (water)" , "Grumble informally" .)