Related Clues:
- Rock-hard
- Promoted one internally in firm
- Outside one is flogged hard
- Thus cover is given for stable
- Pure, as gold
- Firm dealt in clothing items, primarily
- __ as a rock (well-built)
- Neither liquid nor gaseous
- Having no internal cavity
- Reliable — strong
- Firm one's engaged by was traded
- Hard, compact
- Like a rock?
- __ as a rock (reliable)
- Like low-numbered billiard balls