I've made this petal and turned it into a flower:
As you can see I have a problem with the petal no 6. Half of it should overlap petal no 1. I googled that I should use the clipping mask which I did. The result is okay but not perfect (look at the red flower):
Now, I'd like to remove the fill and I followed a tutorial which suggested using Pathfinder -> Trim option. I did that and removed the fill and added a stroke. You can see the result on the green flower.
Obviously this is not the result I'm after. Is there an easier and less messy way to achieve what I'm after? What am I doing wrong? I'm a beginner with Illustrator and don't know how to solve this. I've been working on it for hours now. Please help and thanks. :)