Answer: ifyou

AnswerCrossword Clue
IFYOUPart 3 of quote
IFYOU"... ever plan to motor west..." ("Route 66" intro)
IFYOU"... Leave Me Now" (Chicago tune)
IFYOUHoliday advice, part 1
IFYOU"I will ... will"
IFYOU"... knew Susie like..."
IFYOU".. build it, they ..."
IFYOUAd: Part 3
IFYOUQuote, part 4
IFYOU'Honk -- love ...'
IFYOU'-- say so!'
IFYOU".. only knew!"
IFYOU" ..... prick us, do we not bleed?": Shylock