Many, many moons ago, I was always taught not to 'clip' the leaves, but to gently pull them down, so they virtually peel themselves off of the stem. If you didn't break any part of the the leaf's stem, (or any other part of the plant) it was removed correctly.
But, I can't remember why I was taught this. I think it was all about the growth at that internode, or something like that.
What are the benefits of carefully removing the leaves versus what happens when you just break-off, or cut-off the leaf?