Foreign style manager lacks an article (6)
I believe the answer is:
german
'foreign' is the definition.
(I've seen this before)
'style manager lacks an article' is the wordplay.
'style' indicates an anagram (style can mean to shape or design).
'lacks' suggests deleting specific letters.
'an article' becomes 'a' (the indefinite article in English).
'manager' with 'a' taken away is 'mnager'.
'mnager' anagrammed gives 'GERMAN'.
(Other definitions for german that I've seen before include "Alsatian" , "foreign" , "Teutonic language" , "Goethe's language" , "Hamburger, perhaps" .)