Revealed to be away (3)
I believe the answer is:
out
I believe this is a double definition.
'revealed' is the first definition.
(I've seen this in other clues)
'be away' is the second definition.
('out' can be similar in meaning to 'away')
'to' is the link.
(Other definitions for out that I've seen before include "Disnmissed (cricket)" , "Away; into public domain" , "Elsewhere -- unfashionable" , "Walking back to the pavilion" , "No longer in prison" .)