Related Clues:
- Talk like a curmudgeon, maybe
- Menacing sound from grey bird
- Sound of hostile dog
- Death metal vocal technique, perhaps
- Grade-school fundamentals, initially
- Elementary education, familiarly
- School basics, informally
- Betray one's bad mood
- Ed. basics
- Elementary school trio, briefly
- Warning from a dog
- Ed basics
- One might elicit a nervous 'Nice dog'
- One might elicit a nervous "Nice dog"
- Basics of education, briefly