Individual ignores article about syndicate (6)
I believe the answer is:
cartel
'syndicate' is the definition.
(cartel is a kind of syndicate)
'individual ignores article about' is the wordplay.
'individual' becomes 'i' (Roman numeral for one, ie individual).
'ignores' is a deletion indicator.
'about' indicates anagramming the letters.
'article' with 'i' taken away is 'artcle'.
'artcle' is an anagram of 'CARTEL'.
(Other definitions for cartel that I've seen before include "Business combination to limit competition" , "Alliance to further common aims" , "Market-fixing organisation" , "Bloc" , "Conspiracy of businesses" .)