Part of a saddle (6)
I believe the answer is:
pommel
'part of a saddle' is the definition.
(I know that pommel is part of saddle)
This is all the clue.
(Other definitions for pommel that I've seen before include "part in weapon-making" , "Part of a saddle" , "Knob on a sword hilt" , "Saddle knob" , "Projecting handgrip of a saddle" .)