Possible Clues:

• Common garnish in Chinese dishes
• Well advanced, one's old -- not primarily a candidate for 'salad days'?
• Pungent salad bulb
• Jump aboard repeatedly, holding one vegetable
• Vegetable that's well advanced, number one to be lifted
• Playing with irons, no ping, but one finds one of the greens
• Bulb with leaves eaten in salads