Holiness (8)
'holiness' is the definition.
(synonyms)
This is all the clue.
(Other definitions for sanctity that I've seen before include "Devotion" , "Saintliness" , "Holiness, sacredness" , "Holy or sacred state" , "that should concern church?" .)
'holiness' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for piety that I've seen before include "Godly behaviour" , "Being faithful" , "Devotion to religious principles" , "Quality of being religious" , "Quality of devoutness" .)
'holiness' is the definition.
(sacredness is a kind of holiness)
This is all the clue.
(Another definition for sacredness that I've seen is " Holy quality".)