Ezra’s personal claim comes with “Shut up!” (7)
I believe the answer is:
impound
'shut up' is the definition.
(I've seen this before)
'ezra's personal claim comes with' is the wordplay.
'ezra' becomes 'pound' (Ezra Pound the poet i885-i97m).
'personal claim' becomes 'im' (I am not sure about this - if you are sure you should believe this answer much more).
'comes with' means one lot of letters go next to another.
'pound' after 'im' is 'IMPOUND'.
Can you help me to learn more?
(Other definitions for impound that I've seen before include "Seize and take custody of (items)" , "Seize goods for an infringement of the law" , "Shut up" , "Confiscate" , "appropriate" .)