Coming (6)
'coming' is the definition.
(advent is the arrival or coming of something)
This is all the clue.
(Other definitions for advent that I've seen before include "observed by Christian church" , "Arrival - time before Christmas" , "Arrival (with calendar?)" , "appearance" , "Pre-Christmas season for Christians" .)
'coming' is the definition.
(I know that coming can be written as arrival)
This is all the clue.
(Other definitions for arrival that I've seen before include "Coming - comer" , "Advent" , "Act of coming" , "coming on the scene" , "Appearance (at a place)" .)