Dependent on article found in literature (7)
I believe the answer is:
reliant
'dependent' is the definition.
(I've seen this before)
'on article found in literature' is the wordplay.
'on' becomes 're' (regarding).
'article' becomes 'an' (indefinite article).
'found in' is an insertion indicator.
'literature' becomes 'lit' (abbreviation).
'an' going inside 'lit' is 'liant'.
're'+'liant'='RELIANT'
(Other definitions for reliant that I've seen before include "Banking" , "Inspiring confidence" , "Depending (upon)" , "Dependent upon" , "Dependent - latrine (anag)" .)