Channel starting with poem by artist inspired by Heathcliff's love - it used to give TV depth (7,3,4)

'inspired by heathcliff's love it used to give tv depth' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'channel starting with poem by artist' is the wordplay.
I cannot quite understand how this works, but
'channel' could be 'tube' (tube is a kind of channel) and 'tube' is located in the answer.
'poem' could be 'ode' (ode is a type of poem) and 'ode' is present in the answer.
'by' could be 'at' and 'at' is found within the answer.
'artist' could be 'ra' (Royal Academician, member of Royal Academy of Arts) and 'ra' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?