Association's argument against foreign tourism (10)
I believe the answer is:
consortium
'association's' is the definition.
(consortium is a kind of association)
'argument against foreign tourism' is the wordplay.
'argument' becomes 'con' (con is a kind of argument).
'against' means one lot of letters go next to another.
'foreign' is an anagram indicator (foreign order of the letters).
'tourism' anagrammed gives 'sortium'.
'con'+'sortium'='CONSORTIUM'
(Other definitions for consortium that I've seen before include "Association (of several companies)" , "Syndicate" .)