Possible Clues:

• Numbing substance
• Number employed in the theatre
• Number ten is a cheat, somehow
• Academy in Athens changing name in return for number?
• A person could well be put out by it
• One artistic code of a number used in theatre
• A number of people about to go into the theatre
• Number Ten ace has it sorted
• Number of bodies - can hesitate (anag)
• A number having a stylistic principle