Weigh argument against party on right (8)
I believe the answer is:
consider
'weigh' is the definition.
('consider' can be a synonym of 'weigh')
'argument against party on right' is the wordplay.
'argument' becomes 'con' (con is a kind of argument).
'against' is a charade indicator (letters next to each other).
'party on' becomes 'side' (I've seen this before. I am not sure about the 'on' bit.**).
'right' becomes 'r' (common abbreviation).
'con'+'side'+'r'='CONSIDER'
Can you help me to learn more?
(Other definitions for consider that I've seen before include "Reckon, deem" , "Deem to be, regard" , "Hold" , "Cogitate" , "Look at someone or something thoughtfully" .)