Related Clues:

• Fighting tooth and nail
• Busy, busy, busy
• Have a go __ (try)
• Going ___ (bickering)
• Words after keep or go
• Has one's nose to the grindstone, e.g.
• Hard at work
• Scuffling
• Take a crack __
• Doing the job
• "He's ___ again!"
• Fully engaged
• Going __: squabbling
• Exchanging words
• Keep __ (persevere)