Crossword Puzzle Rendezvous reason

Clue: Rendezvous reason

Lines of reasoning that go nowhere (BLINDALLEYS with 11 letters)
For no real reason (IDLY with 4 letters)
"--- is not to reason why" (OURS with 4 letters)
Reason to wear a hat (BADHAIRDAY with 10 letters)
"We're the reason for the season" could be their motto (SALTANDPEPPER with 13 letters)
Certain rendezvous (TRYST with 5 letters)
Reason for a merchandise return (DEFECT with 6 letters)
Derive from reasoning (INFER with 5 letters)
Reason for missing a gimme? (HASTYPUTTING with 12 letters)
Reasons for an R rating (SEXANDVIOLENCE with 14 letters)