Natual Weed elimination

Dandelions, I use a dandelion puller and carry a bucket.... it pulls them out by the root if done right....True value has them for $25, https://www.amazon.com/Grampas-Weeder-Original-Stand-Remover/dp/B001D1FFZA/ref=sr_1_4?ie=UTF8&qid=1526690692&sr=8-4&keywords=dandelion+puller+tool

Clover only thing I know is using a product from Weed B Gon thats specifically for chickweed and clover. You could use newspaper as a mulch to get them out of areas, but a whole lawn will require an herbicide.

http://www.finegardening.com/article/six-tips-for-effective-weed-control

Clover is actually very nutrition rich for your soil. Mow that down and leave it to nourish the soil. Dandelion you can dig up or use a spray that is safe for grass and will kill the weeds and not the grass. I do that I have few dandelions in my yard despite a neighbor that is more yellow than green right now.

Spray White Vinegar on each dandelion and other weeds, they wither with in 24 hours