Article is unusually practical (9)
I believe the answer is:
realistic
'practical' is the definition.
('realistic' is associated in meaning with 'practical')
'article is unusually' is the wordplay.
'unusually' indicates anagramming the letters.
'article'+'is'='articleis'
'articleis' anagrammed gives 'REALISTIC'.
(Other definitions for realistic that I've seen before include "true-to-life" , "Facing facts, as it is clear" , "Faithful" , "believable" , "It is clear (anag)" .)