Answer: eio

AnswerCrossword Clue
EIOA-to-U trio
EIOPart of a nursery rhyme refrain
EIORefrain ending
EIOKids' song conclusion
EIORefrain part of an old song.
EIO"Old MacDonald" refrain
EIOA-U connection
EIO"Old MacDonald" refrain letters
EIOA-U vowel connection
EIOVowel sequence
EIOEnd of the dell farmer's refrain
EIOA-U linkup
EIOMacDonald's last syllables
EIO"Old MacDonald" ender
EIOEnd of the "Old MacDonald" refrain
EIOMacDonald's last words
EIO"Old MacDonald" refrain part
EIO"Old MacDonald" fragment
EIO"Old MacDonald" syllables
EIOFarm-refrain ending
EIO"Old Macdonald" coda
EIOKiddie-song ending
EIO"Old Macdonald" sequence
EIOKids' song ending
EIO"......! And on this farm he had a cow..."
EIOPart of a farmer's refrain
EIOVowels that end a children's song
EIOFarm song end
EIOLast letters of a farm refrain
EIOVowels at the end of a children's song
EIOLast three syllables of a farm song refrain
EIOOld MacDonald's last letters?
EIO"Old MacDonald" ending
EIOBetween a and u
EIO"Old Macdonald" closer
EIO"Old Macdonald" ender