Consider adding dandelions with your clover. They're pretty and if you harvest the leaves (similar to arugula) and flowers (tea, salad, even wine) they are quite controllable and you save money at the grocery store.
We get a lot of dandelions here anyway so they'd probably end up mingling whether intentional or not - Now I did hear a while ago that all the parts of the dandelion are edible, and that the flowers are delicious fried, but I'm a little afraid of eating things from the lawn because the neighbourhood has a lot of roaming cats and they.. use.. my garden frequently, which puts me off nibbling on them.
I was thinking of intentionally growing them in a raised planter though.