Exalted crowd for the service (4,4)
I believe the answer is:
high mass
'service' is the definition.
(I've seen this before)
'exalted crowd' is the wordplay.
'exalted' becomes 'high' (similar in meaning).
'crowd' becomes 'mass' (massing is a kind of crowding).
'high'+'mass'='HIGH MASS'
'for the' is the link.
(Other definitions for high mass that I've seen before include "full service" , "Church service celebrated with music, incense etc" .)