Vegetable seen in middle of bendy river (6)
I believe the answer is:
endive
'vegetable' is the definition.
(endive is a kind of vegetable)
'middle of bendy river' is the wordplay.
'middle of' indicates the central letters.
'river' becomes 'ive' (I can't justify this - if you can you should give a lot more credence to this answer).
The central letters of 'bendy' are 'end'.
'end'+'ive'='ENDIVE'
'seen in' is the link.
(Other definitions for endive that I've seen before include "Chicory-type salad vegetable" , "Salad plant related to chicory" , "Type of chicory" , "Plant used in salads" , "Curly-leaved plant used as salad" .)