Make fun of teacher initially in front of facility (5)
I believe the answer is:
tease
'make fun of' is the definition.
(I've seen this before)
'teacher initially in front of facility' is the wordplay.
'initially' suggests taking the first letters.
'in front of' is a charade indicator (letters next to each other).
'facility' becomes 'ease' (I've seen this before).
The initial letter of 'teacher' is 't'.
't'+'ease'='TEASE'
(Other definitions for tease that I've seen before include "Josh" , "Page of book" , "Use a comb" , "Kid" , "Deride" .)