I can’t be shifting display case (7)
I believe the answer is:
cabinet
'display case' is the definition.
(I've seen this in another clue)
'i can't be shifting' is the wordplay.
'shifting' is an anagram indicator.
'i'+'cant'+'be'='icantbe'
'icantbe' is an anagram of 'CABINET'.
(Other definitions for cabinet that I've seen before include "high-level meeting" , "meeting of governors" , "Selected ministers" , "Type of cupboard" , "It may be shelved" .)