Dined in college, according to report (5)
I believe the answer is:
eaten
'dined' is the definition.
(I've seen this in another clue)
'college according to report' is the wordplay.
'college' becomes 'eton' (Eton College, English private school).
'according to report' indicates a 'sounds like' (homophone) clue.
'eton' is a homophone of 'EATEN'.
'in' acts as a link.
(Other definitions for eaten that I've seen before include "having been fed?" , "dinners should be" , "worried" , "Gobbled" , "Consumed" .)