Service small state
I believe the answer is:
mass
I believe this clue is a double definition.
'service' is the first definition.
(kind of church service)
'small state' is the second definition.
(abbreviation for Massachusetts; 'small' suggests an abbreviation)
(Other definitions for mass that I've seen before include "what 13 15A [STANDARD MODEL] supposes 12 [HIGGS BOSON] gives other 5A [PARTICLES]s" , "Matter; large amount" , "Christian ritual" , "Rite; quantity of matter" , "Church ceremony" .)