Answer: gordianknot

AnswerCrossword Clue
GORDIANKNOTReal toughie
GORDIANKNOTSeemingly insoluble conundrum
GORDIANKNOTTraffic problem, Greek style.
GORDIANKNOTShoelace job, in Phrygia
GORDIANKNOTPoser
GORDIANKNOTWARNING: Cutting tool required
GORDIANKNOTPerplexing problem