Take off enormous unlined cloak (6)
I believe the answer is:
escape
'take off' is the definition.
(thesaurus)
'enormous unlined cloak' is the wordplay.
'unlined' suggests removing the centre (the lining or stuffing of the word is removed).
'cloak' becomes 'cape' (cape is a kind of cloak).
'enormous' with its middle taken out is 'es'.
'es'+'cape'='ESCAPE'
(Other definitions for escape that I've seen before include "Run away from confinement" , "Elude; break free" , "Decamp" , "Getaway" , "Elude, dodge" .)