Require about ten after article taken over (7)
I believe the answer is:
annexed
'taken over' is the definition.
(annexing is a kind of taking over)
'require about ten after article' is the wordplay.
'require' becomes 'need' (synonyms).
'about' indicates putting letters inside.
'ten' becomes 'X' (Roman numeral).
'after' means one lot of letters go next to another.
'article' becomes 'an' (indefinite article).
'need' placed around 'x' is 'nexed'.
'nexed' after 'an' is 'ANNEXED'.
(Other definitions for annexed that I've seen before include "Added or joined to larger thing" , "Joined through conquest" , "Took possession of, or joined to something larger" , "Took possession of another country" , "Took possession of, often territory" .)