Yes, a thought can be perspicacious if it is insightful, clear, and demonstrates keen understanding or intelligence. A perspicacious thought is usually marked by its clarity and depth of perception.

visionary, spiritualistic, prophetic, perceptive, judicious, intuitive, farseeing, psychic, far-sighted, extrasensory, clear-sighted

"Perspicacious" means having keen insight or understanding, while "perspicuous" means clear and easily understood. So, "perspicacious" refers to the ability to grasp things quickly and deeply, while "perspicuous" pertains to clarity and transparency in communication.

# The perspicacious lawyer made his case to the judge and ended up winning the case. # Many philosophers must be perspicacious to see the questions many people have not thought of. # The perspicacious archer had good aim, but not enough strength to ever hit a target. # The adjective perspicacious means to either have keen vision or to have very good mental perception and understanding. # My friend said, "My psychologist is too perspicacious and I don't like it!" # Since my friend thought that the perspicacious psychologist was annoying, I checked him out. # Eagles are very perspicacious, and that is why we have the expression "eagle-eyes". # My dog is actually perspicacious, because she always acts according to my mood. # Many good doctors are perspicacious and can tell what is wrong with you. # If you are perspicacious, you aren't near sighted!

"Clear" is an adjective. "Clear" is an example of an English word that is in several categories. "Clear" is a verb, but "clear" is also, and mostly, an adjective: the clear glass, the sky is clear.