Anointment (7)
I believe the answer is:
unction
'anointment' is the definition.
(I know that unction is a type of anointment)
This is all the clue.
(Other definitions for unction that I've seen before include "Affected charm" , "Balm - oily charm" , "Religious glibness" , "An anointing; oily charm" , "Act of anointing someone as part of a rite" .)