Possible Clues:

• Tossed-salad ingredient
• Horse _____
• Plant makes radio almost quiet
• Round salad vegetable
• I would shortly return in a red rash
• This plant is hard, brittle
• Peppery root veggie
• Root eaten raw in salads
• Sounds as if one might take it as read that that's something for the Academician to eat
• Rook gets something to eat, an edible root