Gave teacher amended date (7)
I believe the answer is:
donated
'gave' is the definition.
(donating is a kind of giving)
'teacher amended date' is the wordplay.
'teacher' becomes 'don' (don can mean an academic - especially at Oxbridge).
'amended' is an anagram indicator.
'date' anagrammed gives 'ated'.
'don'+'ated'='DONATED'
(Other definitions for donated that I've seen before include "Gave" , "Presented" , "Given" .)