I use a spot at the start of the outpost in the forset of roots. There is a pile, you can dig at with lint and get 7 cloves each. after beating the area there is a way directly downward from the pile so you can reload the spot very quickly. When i used it to farm cloves, i made around 50 cloves/minute. And it was realy easy to do. Just watched some videos on the side

This is basically what I did too. I wish there was a nicer way to make money faster for one of the achievements..
Besides fighting every enemy encounter in the game that I could, I found Numbskull Island in Arr Lagoon (closer to the end of the game) to be the best spot as you are able to farm 40-50 clovers per loading reset (45 clovers/1.5 minutes). Just go north and around digging up the 6 mounds each with 7-ish clovers inside (avoiding enemies and slow loading battles). I was able to make a circle and go back to the loading zone I started, rinse and repeat (in about 45 minutes I had the max clover amount I could carry).
If someone finds a better way, please tell!

Also, love the drawings!