The phrase "little hint" means a small clue or suggestion that helps someone to understand or figure out something.
Sentences with «little hint»
It has lots of little hints of green from the herbs and pistachios. (eggplantandolive.com)
These were previously published images from magazines or books, and as yet gave little hint of his prowess as the artist and book cover illustrator he was to become. (expertsubjects.com)