Get back from River Tees shortly (8)
I believe the answer is:
retrieve
'get back' is the definition.
(thesaurus)
'from river tees shortly' is the wordplay.
'from' indicates an anagram (from the letters).
'shortly' means to remove the last letter.
'river'+'tees'='rivertees'
'rivertees' with its last letter removed is 'rivertee'.
'rivertee' anagrammed gives 'RETRIEVE'.
(Other definitions for retrieve that I've seen before include "Recover" , "Get or bring back something" , "Get back or fetch" , "Go for and bring back" , "Find and bring back" .)