Cooked up stew or fettucine (11)
I believe the answer is:
counterfeit
'cooked up' is the definition.
(cooked up can mean counterfeit or fake)
'stew or fettucine' is the wordplay.
'stew' indicates an anagram.
'or'+'fettucine'='orfettucine'
'orfettucine' is an anagram of 'COUNTERFEIT'.
(Other definitions for counterfeit that I've seen before include "Phoney" , "Sham, fake" , "Forge" , "Forged, false" , "copy" .)