Effectively, got rid of it to be friendly (4-8)
I believe the answer is:
well-disposed
'to be friendly' is the definition.
(I've seen this before)
'effectively got rid of' is the wordplay.
'effectively' becomes 'well' (I can't justify this - if you can you should believe this answer much more).
'got rid of' becomes 'disposed' (I've seen this before).
'well'+'disposed'='WELL-DISPOSED'
'it' is the link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for well-disposed that I've seen before include "Favourable (towards)" , "Inclined to be friendly" .)