Hitherto, elegant forms exposed (2,3,10)
I believe the answer is:
in the altogether
'exposed' is the definition.
(both can mean naked)
'hitherto elegant forms' is the wordplay.
'forms' indicates anagramming the letters.
'hitherto'+'elegant'='hithertoelegant'
'hithertoelegant' is an anagram of 'IN THE ALTOGETHER'.
(Other definitions for in the altogether that I've seen before include "having nothing to wear?" , "barely seen" , "unclothed" , "Naked" , "exposed" .)