Answer: onpop

AnswerCrossword Clue
ONPOP"Hop ..": Dr. Seuss book
ONPOP"Hop ..": Seuss work
ONPOPSeuss's "Hop .."
ONPOP"Hop ..." (Dr. Seuss book)
ONPOPWhere to hop, in a Dr. Seuss book
ONPOP"Hop .." (Seuss book)
ONPOPDr. Seuss' 'Hop --'
ONPOP"Hop ....." (Dr. Seuss book)