Tramp on top of the range video terminal (4)
I believe the answer is:
hobo
'tramp' is the definition.
(both can mean a homeless person)
'top of the range video terminal' is the wordplay.
I cannot really understand how this works, but
'top' could be 'hob' (I have seen 'Top of stove ' mean 'hob' so perhaps 'top' could also mean 'hob') and 'hob' is found in the answer.
'of' could be 'o' and 'o' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'on' acts as a link.
Can you help me to learn more?
(Other definitions for hobo that I've seen before include "Bum" , "Vagrant (US)" , "Tramp (US)" , "Vagrant (American)" , "Itinerant" .)