Related Clues:
- Powerfully persuasive
- Of an argument, convincing
- Backed up by facts
- Convincingly argued
- Powerful dope hidden in bed
- Convincing businessman?
- Points board accepts as defensible
- Sound or credible
- Resistant to attack
- Can be maintained
- Not ridiculous, as an argument
- All but one in football team fit and sound?
- Credible points board accepts
- Sound or defensible
- Seemingly rational little gap in record