I don't know who wrote the prescription (the comment in question is from someone from India, but we don't know where that person is working), but least in the US, M.D.s are known for having terrible, often illegible, handwriting. In spite of that, many prescriptions there are still written by hand. In my experience with that system, it wasn't all that uncommon for a pharmacist to need to call the M.D. to verify what was on the prescription because at least part of it was illegible.
That is precisely what I thought of when I read "This prescription is not clear." "Cleared one" in the second sentence is a bit odd if that is the case, but it may simply mean "one that can be read/is legible.
Of course, the above depends on the prescription having been written by hand, which may not be the case.
Edit: I see it the same as #10