What is adjective of Clearly?

There isn't a direct adjective form of "clearly". "Clearly" is already an adverb, describing how something is done.

If you want to express a similar meaning as an adjective, you could use words like:

* Clear

* Obvious

* Evident

* Distinct

* Unmistakable

For example:

* Clearly: "The answer was clearly stated in the book."

* Clear: "The answer was a clear indication of their understanding."

The best choice will depend on the specific context and the nuance you want to convey.