Hires out a buggy getting permit (9)
I believe the answer is:
authorise
'permit' is the definition.
(authorising is a kind of permiting)
'hires out a buggy' is the wordplay.
'buggy' indicates anagramming the letters.
'hires'+'out'+'a'='hiresouta'
'hiresouta' anagrammed gives 'AUTHORISE'.
'getting' acts as a link.
(Other definitions for authorise that I've seen before include "Give official permission to" , "commission" , "OK" , "Empower, permit" , "Sanction or establish officially" .)