Crossword Puzzle Rid of vermin

Clue: Rid of vermin

Rocky ridge offshore (REEF with 4 letters)
They may offer rides (FAIRS with 5 letters)
Military officer's ride (STAFFCAR with 8 letters)
Amtrak ride that offers high-level math courses? (CALCULUSTRAIN with 13 letters)
Offshore ridge (e.g. REEF with 4 letters)
At the office Mr. Ridder _____ (BOOTEDTHECOMPUTER with 17 letters)
Prohibition-era offering (NEARBEER with 8 letters)
Offer that may be answered by "How much?" (WANNABET with 8 letters)
Hwy. offense (e.g. DUI with 3 letters)
S. & L. offerings (e.g. CDS with 3 letters)