Somewhere to buy food bakers can supply, if not online (5,3)
I believe the answer is:
snack bar
'somewhere to buy food' is the definition.
'bakers can supply if not online' is the wordplay.
I cannot really see how this works, but
an anagram of 'can' is 'nac' which is located in the answer.
This may be the basis of clue (or it may be nonsense).
(Other definitions for snack bar that I've seen before include "Lunch counter" , "Light food outlet" , "Place to buy light meals" , "Where light meals may be bought" , "Place serving 17" .)