Possible Clues:

• Make one's voice heard
• Talk louder, can't hear you
• Express an opinion
• Cry from the back of the auditorium
• Louder! State your views firmly
• Comment to a low talker, or what is found in 4-, 9-, 27-, and 40-Down
• 'Louder!'
• Make a point when drink comes round and don't mumble!
• I can't hear you drink outside Crown
• Say things more loudly