Easy producing dossier about a Conservative (6)
I believe the answer is:
facile
'easy' is the definition.
('facile' can be a synonym of 'easy')
'dossier about a conservative' is the wordplay.
'dossier' becomes 'file' (I've seen this before).
'about' is an insertion indicator.
'conservative' becomes 'c' (abbreviation commonly used in UK politics).
'a'+'c'='ac'
'file' going around 'ac' is 'FACILE'.
'producing' is the link.
(Other definitions for facile that I've seen before include "Easy or superficial" , "Too easily achieved, glib" , "Lacking depth, glibly superficial" , "Over-simple, superficial" , "Simplistic" .)