Tapas turned out to be Italian food (5)
I believe the answer is:
pasta
'be italian food' is the definition.
(I've seen this before)
'tapas turned out' is the wordplay.
'turned out' indicates an anagram.
'tapas' is an anagram of 'PASTA'.
'to' is the link.
(Other definitions for pasta that I've seen before include "dish from Italy" , "Dried flour paste for making Italian food" , "Dried flour paste used in cooking Italian dishes" , "Macaroni, for example" , "Fusilli, penne etc" .)