Studio presenter's tie (6)
I believe the answer is:
anchor
This clue is a double definition.
'studio presenter's' is the first definition.
'tie' is the second definition.
(thesaurus)
(Other definitions for anchor that I've seen before include "I present" , "Ship's mooring at sea" , "Moor (ship at sea)" , "It holds the ship in place" , "Charon (anag.); Styx ferryman" .)