Vegetable banger isn't cooked! (6,4)

I believe the answer is:

string bean

'vegetable' is the definition.
(I know that string bean is a type of vegetable)

'banger isn't cooked' is the wordplay.
'cooked' is an anagram indicator (letters cooked into a new form).
'banger'+'isnt'='bangerisnt'
'bangerisnt' with letters rearranged gives 'STRING BEAN'.

(Another definition for string bean that I've seen is " What may be French or runner".)

I've seen this clue in The Telegraph.

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