To study a hindrance in article that’s hackneyed (10)
I believe the answer is:
threadbare
'hackneyed' is the definition.
('threadbare' can be a synonym of 'hackneyed')
'to study a hindrance in article' is the wordplay.
'to study' becomes 'read' ('read' can be a synonym of 'study').
'a hindrance' becomes 'bar' (bar is a kind of hindrance).
'in' is an insertion indicator.
'article' becomes 'the' (the 'definite article' part of speech).
'read'+'bar'='readbar'
'readbar' placed inside 'the' is 'THREADBARE'.
'that's' is the link.
(Other definitions for threadbare that I've seen before include "Frayed" , "Shabby" , "cliche-ridden" , "deprived of nap" , "Has little nap" .)