Meta only requires a reputation of 1 in order to add comments to a question, however most other require 50 or more. As someone pretty new to using Stack Exchange, I find it frustrating because there are a lot of questions which require clarification.

I find lots of questions where I have lots of knowledge, but I need to ask clarifying questions to properly answer their question. It doesn't feel right for me to put that in an answer, but makes sense to do so as a comment to their question.

What is the best practice for obtaining clarifying information when unable to post a comment?