Answer:

fasten

Answer	Crossword Clue
FASTEN	Tie up
FASTEN	Button up
FASTEN	Secure

FASTEN	Attach
FASTEN	Connect
FASTEN	Attach firmly
FASTEN	Staple, say
FASTEN	".. your seatbelts"
FASTEN	Hook up, as a seat belt
FASTEN	Snap together
FASTEN	Attach, perhaps with hardware that begins the answers to starred clues

FASTEN	Fix
FASTEN	Snap or staple
FASTEN	Buckle up
FASTEN	Click together
FASTEN	Lock into place
FASTEN	Join together
FASTEN	Attach securely
FASTEN	Get together

FASTEN	Nail or tack
FASTEN	".. your seat belts"
FASTEN	Connect, as a seat belt
FASTEN	Buckle
FASTEN	Lock.
FASTEN	Affix.
FASTEN	Cement.
FASTEN	Fix firmly.

FASTEN	Join.
FASTEN	Tether.
FASTEN	Tie.
FASTEN	Secure.
FASTEN	Use a clasp
FASTEN	Hitch
FASTEN	Tie or clasp
FASTEN	Snap a snap on, say

FASTEN	Close, as seatbelts
FASTEN	"... your seatbelts"
FASTEN	Tie down, say
FASTEN	Put the screws to?