Unapproachable station controller? (6)
I believe the answer is:
remote
This clue is a double definition.
'unapproachable' is the first definition.
(thesaurus)
'station controller?' is the second definition.
(TV remote)
(Other definitions for remote that I've seen before include "Miles away" , "'Distant, out-of-the-way (6)'" , "Distant - meteor (anag)" , "At a great distance" , "as from armchair to TV?" .)