Answer:

whereto

Answer	Crossword Clue
WHERETO	Cabbie's query
WHERETO	Cabby's query
WHERETO	Cabbie's question

WHERETO	Fare question
WHERETO	Hack's question
WHERETO	Cabby's question
WHERETO	Fare question?
WHERETO	It's a fare question
WHERETO	Hack's query
WHERETO	To what?
WHERETO	Toward what place?

WHERETO	Question to one who just got in
WHERETO	Hack question