Related Clues:
- Follower of 'had a farm'
- Vowel sequence of song
- Kiddie-song letters
- Three-note quintet
- Letters associated with animal sounds
- Kids' song refrain that's all vowels
- All-vowel refrain from a kids' song
- Childish refrain?
- Not long ago at all: Abbr
- Last letters from a farm refrain
- Children's song refrain found at the starts of 17-, 26-, 35-, 50- and 57-Across
- Kiddie chorus conclusion
- 'Old MacDonald Had a Farm' refrain
- Trailer for farm animals?
- 'Old MacDonald' refrain, and a feature of the five longest Across answers