Related Clues:
- What a puzzle's title alludes to
- Many a frosh course
- Up-front material
- Song part before the opening line
- 101 course
- Most crosswords have one
- Song's opening bars
- Recurring idea
- Opera opening
- Emcee's duty
- Park feature, at times
- A Sunday crossword usually has one
- Performance lead-in
- Musical prelude to opera or ballet
- Instrumental prelude