Asked to go naked, revealed frame (8)
I believe the answer is:
skeleton
'frame' is the definition.
(I know that frame can be written as skeleton)
'asked to go naked revealed' is the wordplay.
'to go naked' means to look at the middle letters (I've seen 'goes naked' mean this (the outside letters are removed)).
'revealed' becomes 'leton' (as in letting on about a secret).
The middle of 'asked' is 'ske'.
'ske'+'leton'='SKELETON'
(Other definitions for skeleton that I've seen before include "The smallest possible number" , "This key fits many locks" , "person in no danger of looking fat!" , "Reduced to essentials" , "Framework of bones" .)