Escorted back, knowing where Dover is (8)
I believe the answer is:
delaware
'where dover is' is the definition.
(Dover is the capital of Delaware)
'escorted back knowing' is the wordplay.
'escorted' becomes 'led' (to lead someone somewhere is to escort them).
'back' says the letters should be written backwards.
'knowing' becomes 'aware' (I've seen this before).
'led' backwards is 'del'.
'del'+'aware'='DELAWARE'
(Other definitions for delaware that I've seen before include "state of the east" , "State of eastern US" , "Second smallest US state" , "One of the original 13 US states" , "This state strangely awed Lear" .)