Briefly coming back to tour a state (6)
I believe the answer is:
nevada
'state' is the definition.
(I know that Nevada is a state)
'briefly coming back to tour a' is the wordplay.
'briefly' means to remove the last letter.
'coming' becomes 'advent' (advent is the arrival or coming of something).
'back' says the letters should be written in reverse.
'to tour' indicates putting letters inside (to tour can mean to go around).
'advent' with its final letter taken away is 'adven'.
'adven' backwards is 'nevda'.
'nevda' enclosing 'a' is 'NEVADA'.
(Other definitions for nevada that I've seen before include "Western US state" , "US desert state" , "State including Las Vegas" , "Southwestern US state" , "Sagebrush State" .)