I can't repair the hole in the case (6)
I believe the answer is:
action
'case' is the definition.
(both refer to legal proceedings)
'i can't repair the hole in' is the wordplay.
'repair' indicates an anagram (letters are fixed or repaired).
'the hole' becomes 'O' (O looks like a hole).
'in' indicates putting letters inside.
'i'+'cant'='icant'
'icant' is an anagram of 'actin'.
'actin' going around 'o' is 'ACTION'.
'the' is the link.
(Other definitions for action that I've seen before include "exploit" , "A judicial proceeding brought by one party against another" , "Deed; armed conflict" , "Accomplishment" , "Battle or lawsuit, maybe" .)