Possible Clues:

• Pitmen perhaps manoeuvring horse and cart
• Outside clubs, the roars upset group of musicians
• Alternative to “stalls” as the name of a theatre seating area
• Musicians in other cars moved
• Wild roar over casket produced by one with a job down the pit?
• Ensemble playing the concert
• Players with excited roar about 16, say
• A maestro conducts it
• Players roar after foul play outside the box
• Wild roar over casket produced by one of those from the pit