Witch doctor dismissing article as false (4)
I believe the answer is:
sham
'false' is the definition.
(thesaurus)
'witch doctor dismissing article' is the wordplay.
'witch doctor' becomes 'shaman' (I've seen this before).
'dismissing' indicates named letters should be taken away.
'article' becomes 'an' (indefinite article).
'shaman' with 'an' taken out is 'SHAM'.
'as' acts as a link.
(Other definitions for sham that I've seen before include "Mock" , "imitation" , "Not what it seems to be" , "Feign" , "False and phoney" .)