False part of expert’s research paper (10)
I believe the answer is:
prosthesis
'false part' is the definition.
(I've seen this before)
'expert's research paper' is the wordplay.
'expert's' becomes 'pro's' (short for professional).
'research paper' becomes 'thesis' (I've seen this before).
'pros'+'thesis'='PROSTHESIS'
'of' is the link.
(Other definitions for prosthesis that I've seen before include "Artificial body-part" , "Artificial body part" , "Part replacement" , "This may supply missing part" , "what can help a handicapped person" .)