Answer: STRAPIN

AnswerCrossword Clue
STRAPINPrepare for takeoff
STRAPINPut on one's seat belt
STRAPINPrepare for a bumpy trip
STRAPINGet ready to take off
STRAPINSecure against jostling
STRAPINPrepare for a wild ride
STRAPINSecure
STRAPINSecure, as a passenger
STRAPINSecure for a flight
STRAPINBuckle up
STRAPINMake secure
STRAPINUse a seat belt
STRAPINSecure, as with a seat belt
STRAPINSecure, as with a car seat
STRAPINUse a safety belt
STRAPINSecure for the trip
STRAPINSecure before traveling