Answer:

USTOUR

AnswerCrossword Clue
USTOUR'64 event for the Beatles
USTOURPro golfers' circuit
USTOURWhat a B'way show might have
USTOURBig trip for a band
USTOURCross-country trip, say
USTOUR1964 event for the Beatles
USTOURSomething a Eur. singer might embark on
USTOURSeries of bookings across America
USTOURThe Beatles had their last one in 1966