Related Clues:

• Skipping syllables
• See 70-Down
• In ___ land (spaced out)
• La-la preceder
• See 41-Down
• Part of a refrain, maybe
• Song bit
• 'La-la' lead-in
• Refrain syllable
• Happy-go-lucky song part
• A chorus line?
• Chorus syllable
• La-la starter
• Carol snippet
• 'I don't know the words' chunk