3: Essays about old dramatic works (9)
6: Former name for joint audition (3)
8: Barque, for one, is a trio-tutor (5-6)
11: Shed light on strange clue I'm seeing (9)
12: Physician that is right is less interesting (5)
13: Knowing everything, signal Lee frantically (3-6)
15: Reportedly scans orchestra section (5)
16: Singers in a special Tosca production (5)
17: Boggy terrain didn't sink Plan C's successor? (9)
18: Article missing from European's sources (5)
20: With greater reason for a riot I riot (1,8)
22: Inspects old radical for a moment (5, 6)
23: Bend in the middle and wind back (3)
24: Coach mens school of North American Indians (9)