I think it sounds like the perfect name for an acne cream, or a window cleaner.
https://translate.google.com/?sl=auto&tl=en&text=clarissant&op=translate (translates as Latin for "they became clear," which is about what I expected, even though I have no actual Latin)
IRL I'd feel about it roughly the same way I feel about
Daenerys or Padmé.
I feel like Clarissant is a bit matronly. I feel like
Clarissa itself seems more youthful and soft.
I slightly resent it because it looks like Melisant, and Melisant makes more sense, but people don't swoon over that.
- mirfak