Speculative article? Old article revamped (11)
I believe the answer is:
theoretical
'speculative' is the definition.
('theoretical' can be similar in meaning to 'speculative')
'article? old article revamped' is the wordplay.
'article?' becomes 'the' (the 'definite article' part of speech).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'revamped' indicates an anagram.
'article' with letters rearranged gives 'retical'.
'the'+'o'+'retical'='THEORETICAL'
(Other definitions for theoretical that I've seen before include "Not practical; speculative" , "concerned with supposition" , "Hypothetical" , "Academic" , "Cheat toiler (anag) - speculative" .)