Related Clues:
- Pure, as gold
- Robust, strong
- Strong and solidly built
- Firm dealt in clothing items, primarily
- Well-built — strapping
- __ as a rock (well-built)
- Read about redhead getting tough
- Neither liquid nor gaseous
- Strong statement of intent from crossword compilers
- Having no internal cavity
- Reliable — strong
- Solidly made
- Firm one's engaged by was traded
- Writing in academic work is robust
- Hard, compact