The French teacher is enticed (3,2)
I believe the answer is:
led on
'is enticed' is the definition.
(I've seen this in another clue)
'the french teacher' is the wordplay.
'the french' becomes 'le' ('the' in French).
'teacher' becomes 'don' (don can mean an academic - especially at Oxbridge).
'le'+'don'='LED ON'
(Other definitions for led on that I've seen before include "deceived" , "Persuaded - tricked" , "Took for a ride" , "Unwisely enticed" , "Beguiled" .)