The writer with viewpoint promoting Liberal mix (7)
I believe the answer is:
melange
'mix' is the definition.
(thesaurus)
'the writer with viewpoint' is the wordplay.
'the writer' becomes 'me' (the person who wrote the clues).
'with' says to put letters next to each other.
'viewpoint' becomes 'lange' (I can't explain this - if you can you should give a lot more credence to this answer).
'me'+'lange'='MELANGE'
'promoting liberal' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for melange that I've seen before include "A French mixture of me with angel" , "A motley assortment of things" , "Medley" , "Confusion" , "Gallimaufry" .)