Plant with edible leafstalks (7)
I believe the answer is:
rhubarb
'plant with edible leafstalks' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for rhubarb that I've seen before include "Word of theatrical mumbling" , "this stick is to be swallowed" , "Edible plant with fleshy reddish leaf-stalks (7)" , "murmurings in the theatre" , "Background noise made by actors" .)