Related Clues:
- Sound of displeasure
- Rough nasal sound of disgust or anger
- Bullish comment?
- Stifled laugh
- Investigate, as a dog does
- Advice from 23-Across?
- Sound indignant
- Derisive noise made through nose
- Pig noise
- "Oink" kin
- Show of incredulity
- Emulate Johnny Depp in 'Blow'
- Relative of a harrumph
- Audible expression of contempt
- Bullish comment