Pay tribute to extremely innovative snack (7)
I believe the answer is:
toastie
'snack' is the definition.
(I've seen this before)
'pay tribute to extremely innovative' is the wordplay.
'pay tribute' becomes 'toast' (I can't explain this - if you can you should give a lot more credence to this answer).
'to extremely' suggests removing the centre.
'innovative' with its middle removed is 'ie'.
'toast'+'ie'='TOASTIE'
Can you help me to learn more?
(Other definitions for toastie that I've seen before include "Grilled sandwich" , "Hot sandwich" , "Heated sandwich" , "Toasted sandwich" , "Browned sandwich" .)