Come to light, become known (9)
I believe the answer is:
transpire
I believe this clue is a double definition.
'come to light' is the first definition.
(synonyms)
'become known' is the second definition.
(I've seen this in another clue)
(Other definitions for transpire that I've seen before include "Prove to be so, happen" , "give off water vapour" , "Become known about terrapins" , "Lose water vapour" , "revealed" .)