Vegetable right next to a plate (6)
I believe the answer is:
radish
'vegetable' is the definition.
(radish is a kind of vegetable)
'right next to a plate' is the wordplay.
'right next' becomes 'r' (I've seen this in other clues).
'plate' becomes 'dish' (I've seen this before).
'r'+'a'+'dish'='RADISH'
(Other definitions for radish that I've seen before include "Hottish salad plant" , "Sir had this vegetable" , "3 down" , "Plant with crisp root eaten raw" , "Bit of salad" .)