Edible stalks rot (7)

I believe the answer is:

rhubarb

I believe this clue is a double definition.

'edible stalks' is the first definition.
(edible leaf stalks)

'rot' is the second definition.
(both can mean rubbish or nonsense)

(Other definitions for rhubarb that I've seen before include "this stick is to be swallowed" , "Plant with fleshy reddish leaf-stalks used like fruit" , "extra speech?" , "Nonsense; plant with edible leaf stalks" , "Meaningless talk" .)

I've seen this clue in The Times.

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