Related Clues:
- Wear a well-trimmed beard
- A rough beard can scratch
- Wear one item of underwear by day with elastic top
- A sort of bread-and-scrape?
- Regular - without problems
- Scrape - rub
- Regular and free from problems
- Flat - consistent - plausible
- Wear away by friction
- Lacking roughness
- Uninterrupted
- Hiccup-free
- Wear roughly
- Scrape roughly
- Use sandpaper on, say