Shown the way out of troubled waters (3)
I believe the answer is:
led
'shown the way' is the definition.
(to lead is to show the way)
'out of troubled waters' is the wordplay.
'out of' indicates a hidden word.
'LED' can be found hidden inside 'troubled waters'.
(Other definitions for led that I've seen before include "Emitter of light" , "Went first to show the way" , "had the edge" , "Influenced" , "Something emitting light" .)