Dog about to get some meat (6)
I believe the answer is:
mutton
'some meat' is the definition.
(mutton is a kind of meat)
'dog about' is the wordplay.
'dog' becomes 'mutt' (mutt is a kind of dog).
'about' becomes 'on' (**).
'mutt'+'on'='MUTTON'
'to get' acts as a link.
(Other definitions for mutton that I've seen before include "Meat that may dress as lamb" , "Flesh of sheep" , "Sheep's flesh" , "Dead, we are told" , "Meat sometimes dressed as lamb" .)