Raid carried out on quiet plant (6)
I believe the answer is:
radish
'plant' is the definition.
(radish is a kind of plant)
'raid carried out on quiet' is the wordplay.
'carried out' indicates anagramming the letters (letters carried to different places).
'on' is a charade indicator (letters next to each other).
'quiet' becomes 'sh' (both can be said to tell someone to be quiet).
'raid' with letters rearranged gives 'radi'.
'radi'+'sh'='RADISH'
(Other definitions for radish that I've seen before include "Pungent, red salad vegetable" , "Small red salad vegetable" , "Plant with crisp root eaten raw" , "Edible small root" , "Hard vegetable" .)