Ban embracing one section is involving a negotiated accord (10)
I believe the answer is:
bipartisan
'a negotiated accord' is the definition.
I can't judge whether this definition defines the answer.
'ban embracing one section is' is the wordplay.
'embracing' means one lot of letters goes inside another.
'one' becomes 'i' (Roman numeral).
'section' becomes 'part' (synonyms).
'i'+'part'+'is'='ipartis'
'ban' placed around 'ipartis' is 'BIPARTISAN'.
'involving' acts as a link.
Can you help me to learn more?
(Other definitions for bipartisan that I've seen before include "between political groups" , "As is cooperation between two parties" , "Cooperative" , "With both sides' agreement" , "using both sides" .)