No longer a form of grub (5)

I believe the answer is:

pasta

'form of grub' is the definition.
(I know that pasta is a type of staple food)

'no longer a' is the wordplay.
'no longer' becomes 'past'.
'past'+'a'='PASTA'

(Other definitions for pasta that I've seen before include "Spaghetti, perhaps" , "Fusilli, tortelloni etc" , "Tapas (anag)" , "dish from Italy" , "dish high in carbohydrates" .)

I've seen this clue in the Evening Standard.

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