Related Clues:
- Went on and on
- Talked nonstop on one subject
- Talked nonstop on a subject
- Moped
- Was in a funk
- Reiterated, with ''on''
- Was a nag
- Meditated gloomily
- Worried persistently
- Insisted (on)
- Talked repeatedly and tiresomely about
- Talked repeatedly and tiresomely - on musical instrument?
- Sat on eggs or thought anxiously about something
- Was in a huff
- Was glum