Crossword puzzle clue "tough to understand"

Here are the possible solutions for tough to understand clue

Answer
Clue
Relevancy
arcane
Clue
Tough to understand
Definition
mysterious
abstruse
Clue
Hard to understand
Difficult to understand
Definition
difficult to understand
accept
Clue
Understand
Definition
to receive with favour
ads
Clue
What TiVo users may skip over ... and what you must skip over to understand this puzzle's theme
Definition
AD, (colloquial) an advertisement
aha
Clue
"Now I understand!"
"I understand now!"
"Now I understand it!"
Definition
an interjection expressing exultation

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