Compulsion from person in service rising to stop sacrifice (10)
I believe the answer is:
obligation
'compulsion' is the definition.
(thesaurus)
'person in service rising to stop sacrifice' is the wordplay.
'person in service' becomes 'GI' (informal term for a US soldier).
'rising' says the letters should be written backwards (going up in a down clue).
'to stop' means one lot of letters goes inside another.
'sacrifice' becomes 'oblation' (oblation is a sacrifice or offering to a god).
'gi' reversed gives 'ig'.
'ig' put inside 'oblation' is 'OBLIGATION'.
'from' is the link.
(Another definition for obligation that I've seen is " Duty".)