Solutions Difficult problem has 6 entries with similar clues
- facerUnexpected and difficult problem
- toughnutProblem that's difficult to deal with
- run-up-againstExperience a difficulty or problem
- ignotum-per-ignotiusExplanatory that is more difficult to understand than the problem
- an-easy-nut-to-crackNot very difficult problem to solve
- cut-the-gordian-knotSolve a difficult problem in a direct way