Answer:

zipup

Answer	Crossword Clue
ZIPUP	Close one's jacket, perhaps
ZIPUP	Close, as a jacket
ZIPUP	Mom's cold-weather admonition

ZIPUP	Close, as jeans
ZIPUP	Mom's cold-morning reminder
ZIPUP	Close, as a parka
ZIPUP	Close, as a fly
ZIPUP	Seal, in a way
ZIPUP	Mom's winter morning reminder
ZIPUP	Prepare for wintry weather
ZIPUP	Close, as a suitcase

ZIPUP	Close
ZIPUP	Add spice to
ZIPUP	Close in a way
ZIPUP	Close, as a windbreaker
ZIPUP	Attend to a fly
ZIPUP	Take care of a fly
ZIPUP	Take care of a fly?
ZIPUP	Finish putting on pants, say