Possible Clues:

• Getting louder, musically
• Endless urban street party growing in volume
• From Italian for ''growing''
• Increase of loudness
• Sign when playing soccer badly, letting in goal
• Gradual increase in volume ... or a hint to the diagonal part of each starred clue's answer
• Endless fuss during part of Mass getting louder
• Gradual increase in sound
• Climax from short clip describing key motive
• High point of teaching taking short view