... old organised church holds sound sacrament (9)
I believe the answer is:
ordinance
'sacrament' is the definition.
(thesaurus)
'old organised church holds sound' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'organised' becomes 'ran' (I've seen this before).
'church' becomes 'ce' (abbreviation for Church of England).
'holds' indicates putting letters inside.
'sound' becomes 'din' (din can mean a loud disturbance).
'ran'+'ce'='rance'
'rance' going around 'din' is 'rdinance'.
'o'+'rdinance'='ORDINANCE'
(Other definitions for ordinance that I've seen before include "religious service maybe" , "Canon" , "Showing resolution" , "practice" , "law" .)