Related Clues:
- Charging
- Marauder's activity
- Encroaching
- Fighting, with "it"
- Beginning with vigor
- Tending to spread, like plants or disease
- Taking the offensive is some help in boxing arena
- Like biopsies
- Tending to spread
- Attacking coterie with inside help
- Tending to intrude
- Plundering gang has inside help
- Van is out at 4.15, popping up everywhere
- Rebel leader gets backing after mounting attacks
- Making inroads