Disclose, make known (6)
I believe the answer is:
reveal
I believe this is a double definition.
'disclose' is the first definition.
(I know that reveal is a more specific form of the action disclose)
'make known' is the second definition.
(revealing is a kind of making known)
(Other definitions for reveal that I've seen before include "Final disclosure" , "Make known, expose" , "Open up" , "Uncover or expose" , "Remove cover to display" .)