Supply food in college diner without starter (5)
I believe the answer is:
cater
'supply food' is the definition.
(synonyms)
'college diner without starter' is the wordplay.
'college' becomes 'c'.
'diner' becomes 'eater' (to dine is to eat a meal).
'without starter' means to remove the first letter.
'eater' with its initial letter taken off is 'ater'.
'c'+'ater'='CATER'
'in' acts as a link.
(Other definitions for cater that I've seen before include "Supply food and drink" , "React (anag.)" , "Trace (anag.)" , "Provide for function" , "Supply food for social event" .)