Possible Clues:

• (Of machine) function
• Work as a surgeon
• Musical drama by Lawrence found to be effective
• Queen replaces one in drug work
• Musical drama extremely tiresome work
• Use
• Without Conservative, manage to consider act
• What may be on on the theatre, and up to what one may do in the theatre
• Do a tracheotomy, perhaps
• To work in the theatre, start with song