Ringer on one business south-east is looking for a fight (9)
I believe the answer is:
bellicose
'looking for a fight' is the definition.
I can't tell whether this definition defines the answer.
'ringer on one business south-east' is the wordplay.
'ringer' becomes 'bell' (a bell rings).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'one' becomes 'i' (Roman numeral).
'business' becomes 'co' (short for company).
'south east' becomes 'SE' (abbreviation).
'bell'+'i'+'co'+'se'='BELLICOSE'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for bellicose that I've seen before include "Jingoistic" , "Belligerent" , "Aggressive and willing to fight" , "Pugnacious, eager to fight" , "Combative" .)