The phrase 'purple clover' means erect to decumbent short-lived perennial having red-purple to pink flowers; the most commonly grown forage clover
Yes! Many purple flowers are edible, ie: Chive Blossoms, Borage, Sage, Impatiens, Lavender, Lilac, Nasturtium, Pansy, and Violets, to name a fw.
NO
yes it smells like rabits
Trifolium purpureum