TV and press perhaps rubbish backing negotiation specialist (8)
I believe the answer is:
mediator
'rubbish backing negotiation specialist' is the definition.
I can't judge whether this defines the answer.
'tv and press' is the wordplay.
'tv' becomes 'tor' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'press' becomes 'media' (the press is part of the media).
'tor' put after 'media' is 'MEDIATOR'.
'perhaps' acts as a link.
Can you help me to learn more?
(Other definitions for mediator that I've seen before include "Negotiator between opposing parties" , "peacemaker" , "One intervening to settle a dispute" , "Go-between, negotiator" , "Kind of arbitrator - one to admire" .)