"clarify some points" is correct and usable in written English.
It is often used when one wants to explain or better explain a subject. For example, "I'd like to take this opportunity to clarify some points about our new policy."
1.59pm BST A senior Conservative party source wants to clarify some points in the briefing note.
However, we would like to clarify some points regarding One Union Square South.
The goal of this article is to clarify some points of the formulation presented in the "T.G.
I do my best to cover everything, but I'm still interrupted a few times by the residents or the attending physician to clarify some points.
In its statement, the McAllen Independent School District said: McAllen I.S.D. would like to clarify some points regarding an article in an online publication.
SIR —I would like to clarify some points in your article and provide some recommendations for Angela Merkel and Tony Blair.
The Financial Services Authority, a nongovernmental body financed by the securities firms and other companies it regulates, said it did not water down the original proposals in response to concerns expressed by those companies, but merely clarified some points.
Last but not least, I'm grateful for the support of the citizens of the U.K, as seen in Facebook and Twitter, and hope that this clarifies some points regarding the events that are taking place.
Even though the exchanges in the chain show Cardona, indeed, clarifying some points with the DNC, consider that she was pre-clearing an essay with partisan officials who appeared to tilt toward Clinton.
UPDATED: This piece engendered enough discussion that I thought it was worth clarifying some points and adding some nuance that I failed to do earlier.
Post-post note: I have clarified some points in the text to recognize that the re-injected water is from all drilling operations, not just fracking, and that less than 5% of the wastewater being disposed of comes from frack flowback water.
