Answer: zipper

AnswerCrossword Clue
ZIPPER

It may be under a fly

ZIPPER

Velcro alternative

ZIPPER

Tote-bag feature

ZIPPER
Revolutionary device for avoiding buttons.
ZIPPER
Garment fastener.
ZIPPERFastener.
ZIPPERFastener
ZIPPERInvention of I891
ZIPPERButtons' replacer
ZIPPERSleeping bag closer
ZIPPERNothing for each fastener (6)
ZIPPERCase closer
ZIPPERSleeping bag closure
ZIPPERType of fastener
ZIPPERSlide fastener