Article initially consistent with grant to take office (6)
I believe the answer is:
accede
'take office' is the definition.
'article initially consistent with grant' is the wordplay.
'article' becomes 'a' (indefinite article).
'initially' says to take the initial letters.
'with' says to put letters next to each other.
'grant' becomes 'cede' ('cede' can be a synonym of 'grant').
The initial letter of 'consistent' is 'c'.
'a'+'c'+'cede'='ACCEDE'
'to' is the link.
(Other definitions for accede that I've seen before include "Succeed to or allow" , "Agree - take the throne" , "Agree (to request)" , "'Take office, as king say (6)'" , "Allow, acquiesce" .)