Related Clues:
- More breakable
- Less affable
- Renters of more strict sort
- The longer a sentence, the more it gets like this
- More likely to crumble
- Behind about to turn less flexible
- More strict
- More serious author writing for schoolchildren, for example
- More rigid
- More backward? Well more inflexible anyway
- Back with little hesitation the more rigorous
- Novelist right to be more rigorous
- More demanding manoeuvre catching navy
- Backer?
- Rear gunner's final two are more serious