One bad chap with me to arraign (7)
I believe the answer is:
impeach
'arraign' is the definition.
(I've seen this before)
'one bad chap with me' is the wordplay.
'one' becomes 'i' (Roman numeral).
'bad' indicates an anagram.
'with' means one lot of letters go next to another.
'chap' put after 'me' is 'mechap'.
'mechap' is an anagram of 'mpeach'.
'i'+'mpeach'='IMPEACH'
'to' acts as a link.
(Other definitions for impeach that I've seen before include "Bring an accusation against" , "In America, charge with misconduct - say President" , "Level a charge against -- pace him (anag)" , "Disparage" , "Charge with treason, etc" .)