A request received by US city or state (6)
I believe the answer is:
alaska
'state' is the definition.
(Alaska is an example)
'a request received by us city' is the wordplay.
'request' becomes 'ask' ('ask' can be a synonym of 'request').
'received by' indicates putting letters inside.
'us city' becomes 'la'.
'ask' put inside 'la' is 'laska'.
'a'+'laska'='ALASKA'
'or' is the link.
(Other definitions for alaska that I've seen before include "Most northerly state of America" , "North-western US state" , "Coldest US state" , "Most northerly state of USA" , "Largest US state by area" .)