Deposit on TV? (3)
I believe the answer is:
set
I believe this clue is a double definition.
'deposit' is the first definition.
(thesaurus)
'tv?' is the second definition.
(tv is a kind of set)
'on' is the link.
(Other definitions for set that I've seen before include "Become solid like jelly" , "Gel; group" , "Go below the horizon," , "decline" , "Class" .)