Made free carpet kept in cover (9)
I believe the answer is:
liberated
'made free' is the definition.
(to liberate someone is to make them free)
'carpet kept in cover' is the wordplay.
'carpet' becomes 'berate' (I've seen this before).
'kept' indicates putting letters inside.
'in cover' becomes 'lid' (lid is a kind of cover. I am not sure about the 'in' bit.).
'berate' inserted within 'lid' is 'LIBERATED'.
(Other definitions for liberated that I've seen before include "Free" , "Freed from social conventions" , "Having stolen" , "Emancipated" , "Released" .)