Related Clues:

• "Look ___ this way . . ."
• Like perennial rivals, constantly
• In a shouting match, perhaps
• Busily engaged
• On task
• Attacking the task
• Perplexing how different people are in smell, to me
• Irritating old boy backs sending son into the city
• A bird is busy
• A pain mostly there in chest? Start to exhale
• Occupied in some way
• Agitating
• Occupied (in crime?)
• Annoying to disturb a few
• Be renovating the rooms in it: a nuisance