Possible Clues:

• Listen to Sally again as practice
• Practice session in preparation for public performance
• Practice session
• Tries interrupting actual practice for players
• For practice, include corny items among fabulous Lehar
• To cut through concrete, picks up drill
• Listens during actual practice session
• Tries again to pre-empt a student's dry run
• Tries during actual practice session
• Tries in actual practice