Crossword Puzzle Swerves off course

Clue: Swerves off course

A large one offers many courses (MENU with 4 letters)
Offer courses for (CATER with 5 letters)
It offers courses of ancient history (PALEODIET with 9 letters)
Amtrak ride that offers high-level math courses? (CALCULUSTRAIN with 13 letters)
Monster offering? (JOB with 3 letters)
Office accumulation (FILES with 5 letters)
Counter offer? (e.g. BLT with 3 letters)
Parlor offerings (PIZZAS with 6 letters)
In an offbeat way (ODDLY with 5 letters)
"__ Be a Long Time": song by The Offspring (ITLL with 4 letters)