Compere to grill teacher (11)
I believe the answer is:
toastmaster
'compere' is the definition.
(I know that toastmaster is a type of compere)
'grill teacher' is the wordplay.
'grill' becomes 'toast' (I've seen this before).
'teacher' becomes 'master' (I've seen this before).
'toast'+'master'='TOASTMASTER'
'to' acts as a link.
(Other definitions for toastmaster that I've seen before include "Emcee at a banquet" , "one announces at dinner" , "One proposing" , "Dinner speaker" , "Organizer of tributes" .)