3d New composition for cantor left to female singer (9)
5d RA, perhaps, excited about best people in art school (3-11)
28a Problem of mine stimulated a politician (8)...
7d On English research site, speaking at length and adding to much detail (4-11) O---/E-A-O-A-I-G 13d Romance with a female, beautiful with nothing on (4,6) -O-E/-F-A-R 17a Joined and served? Not I...