Seat of learning regularly infers vicar is in Pacific islands (9)
I believe the answer is:
polynesia
'pacific islands' is the definition.
(I've seen this before)
'seat of learning regularly infers vicar' is the wordplay.
'seat of learning' becomes 'poly' (I can't explain this - if you can you should believe this answer much more).
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'infers'+'vicar'='infersvicar'
The alternate letters of 'infersvicar' are 'nesia'.
'poly'+'nesia'='POLYNESIA'
'is in' acts as a link.
Can you help me to learn more?
(Other definitions for polynesia that I've seen before include "Islands including Hawaii, Tonga, Samoa, etc." , "large group of islands" , "Antipodeans around here" , "Pacific islands incl. N Zealand, Samoa and Hawaii" , "Extensive group of Pacific islands" .)