Crossword puzzle clue "button zipper or snap"

Theme #2 (Bu-bu-bu-bum snap snap, bu-bu-bu-bum snap snap, bu-bu-bu-bum, bu-bu-bu-bum, bu-bu-bu-bum), with "the"

Button, zipper or snap

Snap a snap on, say

[Snap snap]

"Snap Your Fingers, Snap Your Neck" band

It may be a snap to snap

Clothing item with a zipper in the back, perhaps

Zipper opening