The Spanish commander consuming new Italian dish (7)
I believe the answer is:
lasagna
'italian dish' is the definition.
(I've seen this before)
'the spanish commander consuming new' is the wordplay.
'the spanish' becomes 'las' ('the' in Spanish).
'commander' becomes 'aga' (I've seen this before**).
'consuming' indicates putting letters inside.
'new' becomes 'n'.
'aga' going around 'n' is 'agna'.
'las'+'agna'='LASAGNA'
(Other definitions for lasagna that I've seen before include "Italian dish" , "Italian food" , "Baked pasta dish" , "Broad flat pasta" , "Italian cooking" .)