Vegetable I put between two legs (5)
I believe the answer is:
onion
'vegetable' is the definition.
(onion is a kind of vegetable)
'i put between two legs' is the wordplay.
'two legs' means two replacements for 'leg'.
'put between' means one lot of letters goes inside another.
'leg' becomes 'on' (cricket term, fielding positions).
'leg' becomes 'on' (cricket term, fielding positions).
'on'+'on'='onon'
'i' inserted inside 'onon' is 'ONION'.
(Other definitions for onion that I've seen before include "Edible tear-jerker" , "Pungent vegetable" , "Aromatic flavourful versatile vegetable" , "one understood by expert" , "Type of allium" .)