Request to enter a filming location in US state (6)
I believe the answer is:
alaska
'us state' is the definition.
(I've seen this before)
'request to enter a filming location' is the wordplay.
'request' becomes 'ask' (to ask is to request something).
'to enter' is an insertion indicator.
'a filming location' becomes 'ala' (I can't justify this - if you can you should believe this answer much more).
'ask' put within 'ala' is 'ALASKA'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for alaska that I've seen before include "Land bought by the USA from Russia in 1867" , "Largest state of the USA" , "Most northerly state of USA" , "Most northerly state of America" , "Coldest US state" .)