Secret man, I care to be devious (2,6)
I believe the answer is:
in camera
'secret' is the definition.
(legal term meaning in private, lit. 'in a chamber')
'man i care to be devious' is the wordplay.
'to be devious' indicates anagramming the letters.
'man'+'i'+'care'='manicare'
'manicare' anagrammed gives 'IN CAMERA'.
(Other definitions for in camera that I've seen before include "without full scrutiny?" , "Taking place in private" , "'In private (2,6)'" , "American (anag) - not open" , "Of courts, heard in judge's private room" .)