Satiating (7)
I believe the answer is:
filling
'satiating' is the definition.
('fill' can be a synonym of 'satiate')
This is the entire clue.
(Other definitions for filling that I've seen before include "Tooth insert" , "Satisfying (meal); one given by dentist" , "Finding someone for (a post)" , "Contents" , "Requirement of teeth or petrol tank?" .)