Allows to hire school (4)
I believe the answer is:
lets
'allows to' is the definition.
(I've seen this in another clue)
'hire school' is the wordplay.
'hire' becomes 'let' (I've seen this before).
'school' becomes 'S'.
'let'+'s'='LETS'
(Other definitions for lets that I've seen before include "Yes" , "we shall serve them again!" , "Leases" , "Rents out or allows" , "Permits" .)