Visible perspicacity (7)
I believe the answer is:
insight
I believe this clue is a double definition.
'visible' is the first definition.
(something in sight is visible)
'perspicacity' is the second definition.
(I've seen this before)
(Other definitions for insight that I've seen before include "ability to perceive clearly" , "Grasp" , "Things I have understanding of" , "Enlightenment" , "Perspicacity" .)