Related Clues:
- Engaged in fighting
- More than just saber-rattling
- In conflict, seriously
- 'Look ___ this way ...'
- Working on the task
- A singer performing
- Keep __: persevere
- Working tirelessly
- Studying like crazy, say
- Arguing or laboring
- Having a spat
- Keep ___ (persevere) (2 words)
- Busily working (2 words)
- Battling big-time
- Keep __ (be persistent)