Answer: nanana

AnswerCrossword Clue
NANANA

My Chemical Romance song, or 1-3 of its subtitle

NANANA

"Shoop Shoop Song" syllables

NANANA

"The Night They Drove Old Dixie Down" syllables

NANANA
"Get a Job" syllables
NANANA
Repeated sounds in "Hey Jude"
NANANALyric stand-in, perhaps
NANANA"Hey Jude" sounds
NANANARefrain bit
NANANARepeating part of "Hey Jude"
NANANARefrain syllables
NANANALyric substitution, perhaps
NANANAPart of the "Hey Jude" refrain