Release Effect... ?

I click a moving light then I hit an effect, and it runs on that light. No Problem. I have grabbed other lights and set them to certain positions, and I want to now stop the effect on the first moving light. If I press Clear, the positions get deleted.

How do I release an effect. Isn't there a function like touch the effect and press release? But that releases the cuelist, not the effect. I'm stumped.
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