Answer: hailacab

AnswerCrossword Clue
HAILACAB

Decide not to walk, perhaps

HAILACAB

Cry "Taxi!"

HAILACAB

Yell "Taxi!"

HAILACAB
Seek a ride, in a way
HAILACAB
Raise one's hand, perhaps
HAILACABWave from the curb, say