A main camouflage for the true inner self (5)
I believe the answer is:
anima
'the true inner self' is the definition.
(I've seen this in another clue)
'a main camouflage' is the wordplay.
'camouflage' indicates an anagram (I've seen 'camouflaged' mean this (I've seen this in other clues)).
'main' anagrammed gives 'nima'.
'a'+'nima'='ANIMA'
'for' is the link.
(Other definitions for anima that I've seen before include "Inward part of the psyche" , "Inner personality (psychol.)" , "Part of psyche directed inwards" , "Soul" , "female aspect of personality" .)