Want expensive article, not English (6)
I believe the answer is:
dearth
'want' is the definition.
(dearth is a kind of want)
'expensive article not english' is the wordplay.
'expensive' becomes 'dear' (I've seen this before).
'article' becomes 'the' (the 'definite article' part of speech).
'not' suggests deleting specific letters.
'english' becomes 'e' (abbreviation).
'the' with 'e' taken away is 'th'.
'dear'+'th'='DEARTH'
(Other definitions for dearth that I've seen before include "deficiency" , "In short supply" , "From shortage of food" , "Hatred (anag) -- shortage" , "Lack of resources" .)