Case where rule lifted, then allowed (6)
I believe the answer is:
wallet
'case' is the definition.
(I know that wallet is a type of case)
'rule lifted then allowed' is the wordplay.
'rule' becomes 'law' (law is a kind of rule).
'lifted' says the letters should be written backwards (going up in down clue).
'then' means one lot of letters go next to another.
'allowed' becomes 'let' (to let is to allow or permit).
'law' written backwards gives 'wal'.
'wal'+'let'='WALLET'
'where' acts as a link.
(Other definitions for wallet that I've seen before include "Pocket-sized money case" , "Purse for notes" , "Pocket-size case" , "A man's pocket-book" , "ready to come out of it?" .)