Discuss meat, but don’t mince words (4,6)
I believe the answer is:
talk turkey
'don't mince words' is the definition.
(I've seen this before)
'discuss meat' is the wordplay.
'discuss' becomes 'talk'.
'meat' becomes 'turkey' (turkey is a kind of meat).
'talk'+'turkey'='TALK TURKEY'
'but' is the link.
(Other definitions for talk turkey that I've seen before include "Discuss a matter straightforwardly" , "(In business) discuss frankly" , "Speak bluntly; get down to business" , "rabbit directly" , "Speak frankly (about the Christmas dinner?)" .)