Buff leather got buckles (10)
I believe the answer is:
altogether
'buff' is the definition.
('altogether' can be a synonym of 'buff')
'leather got buckles' is the wordplay.
'buckles' indicates anagramming the letters.
'leather'+'got'='leathergot'
'leathergot' anagrammed gives 'ALTOGETHER'.
(Other definitions for altogether that I've seen before include "Completely, on the whole" , "Quite" , "Wholly" , "totally" , "Entirely" .)