Possible Clues:

• Stimulation - sound of bee
• Sense of excitement resulting from phone call
• Hum of excitement; murmur
• A follower at university snoring like a bee we hear
• Thrill
• Sounds like an insect getting a follower for upstart snoring
• WWII V-1 pilotless aircraft (informal)
• Call large bird, not difficult in East London
• Drone — bustle
• Thrill; bee's sound