Related Clues:
- A worn groove - don't live in one
- Learn by . . . . to have off by heart
- Kind of groove or fixed habit
- Groove or furrow - don't get into one
- Recurrent theme as in musical work
- Theme as in music
- By . . . . - by memory without thinking
- Deep worn track, a bad place to be
- Just by memory - that tore it
- Theme or recurring feature in music or writing
- Deep track worn as by wheel
- Unifying idea in an artistic work
- Monotonous routine that's hard to escape
- Monotony that's hard to escape
- Repetition of something to be learned