Leg perhaps as a Xmas gewgaw (8,6)
I believe the answer is:
stocking filler
'leg' is the definition.
(I've seen this before)
'as a xmas gewgaw' is the wordplay.
I cannot quite understand how this works, but
'as' could be 'in' (I've seen this in other clues) and 'in' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'perhaps' is the link.
Can you help me to learn more?
(Other definitions for stocking filler that I've seen before include "What hardware store is doing" , "little gift?" , "small Christmas gift" , "Pin, for girl, might be" , "a woman's leg, perhaps?" .)