The phrase "a tiny hint of it" is correct and usable in written English.
You can use it when describing a subtle or faint indication of something, often in a context related to flavor, emotion, or appearance.
Example: "The dessert had a tiny hint of it, making the overall flavor more complex and intriguing."
Alternatives: "a slight trace of it" or "a subtle suggestion of it."
A term like sleeper cell probably sticks in our heads because it contains a tiny hint of embedded poetry, and for the same reason it's hard to forget those 72 black-eyed virgins whom the terrorists believed they were on their way to meet.
It's an action film, with just a tiny hint of a brain, and a reminder, though you would never guess this from all the remakes pouring out of Hollywood these days, that movies are often better at making up new stories than at retelling the old ones.
It could possibly stain your hair and leave a tiny hint of color even after several washes.
It's a very-nearly-matte with loads of pigment and a tiny hint of sheen for a look that's easier to wear.
The nearest we get to a prickle of conflict is in those same restoration workshops: there's only a tiny hint of the debate raging over how deleterious conservation may be, and what its purpose ought to be.
"How does it make me feel being Caroline Kennedy?" she asks, and laughs at him, her mockery spiced with a tiny hint of flirtation.
But her arms and legs were thin and wasted-looking, and she had only a tiny hint of the expected baby bump.
Fast-forward almost 20 years and, with the country on the brink of another momentous electoral change, there is a tiny hint of optimism bubbling up.
Now, with this latest film, Green has fully rediscovered his first, Malickian, style – though there is, interestingly, a tiny hint of wackiness.
They sing about friendship, hangovers, broken hearts and first loves, with a tiny hint of melancholy on songs such as "Wild Young Hearts": "I'm not what I was last summer/ Not who I was in the spring".
