Some article on New York (3)
I believe the answer is:
any
'some' is the definition.
(similar in meaning)
'article on new york' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'new york' becomes 'ny'.
'a'+'ny'='ANY'
(Other definitions for any that I've seen before include "One (unspecified)" , "Long-running Radio 4 discussion show" , "A lot < ? Not a lot < -- some" , "One, some, every or all without specification" , "Some; none in particular" .)