Performing wild cats ignoring large vegetables (6)
I believe the answer is:
onions
'vegetables' is the definition.
(onion is a kind of vegetable)
'performing wild cats ignoring large' is the wordplay.
'performing' becomes 'on' (as in being on stage).
'wild cats' becomes 'lions' (I've seen this in another clue).
'ignoring' suggests deleting specific letters.
'large' becomes 'L' (eg in clothes sizes).
'lions' with 'l' removed is 'ions'.
'on'+'ions'='ONIONS'
(Other definitions for onions that I've seen before include "Experts know theirs" , "England medium-fast bowler" , "Pungent bulbs (6)." , "If you knew your vegetables, you'd be well up" , "Tearful bulbs" .)