One with secrets to tell (3)
I believe the answer is:
spy
'one with secrets to tell' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for spy that I've seen before include "Discover" , "Catch sight of" , "Keep watch secretly, maybe for foreign government" , "Person who secretly collects information as for government" , "One gathers information on enemies" .)