Crossword Puzzle What grading will get rid of

Clue: What grading will get rid of

Offshore attention-getter (AHOY with 4 letters)
Sherwin-Williams offering (e.g. ENAMELPAINT with 11 letters)
Rebel officer at Gettysburg (KEMPER with 6 letters)
They may offer rides (FAIRS with 5 letters)
Wild-riding squire of "The Wind in the Willows" (MRTOAD with 6 letters)
At the office Mr. Ridder _____ (BOOTEDTHECOMPUTER with 17 letters)
Amtrak ride that offers high-level math courses? (CALCULUSTRAIN with 13 letters)
Military officer's ride (STAFFCAR with 8 letters)
Offshore ridge (e.g. REEF with 4 letters)
Rocky ridge offshore (REEF with 4 letters)