Related Clues:
- Treble, alto or bass
- Oratorio opener, often
- Sheet music pitch indicator
- Open University about to make an offer
- Mark determining musical pitch of notes
- Symbol written on sheet music to indicate pitch
- Staff opening?
- Song line starter
- F or G, e.g
- Approach conspicuous river
- Approach an orchestral piece
- On-staff figure?
- Against entering rocky route on approach
- Approach public on river
- Symbol of Conservative and most of opposition?