Plump pixie returning throw (6)
I believe the answer is:
fleshy
'plump' is the definition.
(I've seen this in another clue)
'pixie returning throw' is the wordplay.
'pixie' becomes 'elf' (synonyms).
'returning' shows that the letters should be reversed in order.
'throw' becomes 'shy' (shy is a kind of throw).
'elf' backwards is 'fle'.
'fle'+'shy'='FLESHY'
(Other definitions for fleshy that I've seen before include "Fat" , "Plump; soft and thick" , "voluptuous!" , "Plump and meaty" , "Pulpy" .)