17a. Husband enters Sacré-Coeur and St Sulpice, say, and other places of worship
PARISH CHURCHES
I get the parse except for the st Sulpice connection.
21a. Bone set with a common purpose
PHALANX
Parse?
26a. Old people here turned in precious stones, initially
ICENI
Parse?
8d. They go out for a Latin class
EXEUNT
Parse?