Control wild US critter (9)
I believe the answer is:
stricture
'control' is the definition.
(I've seen this in another clue)
'wild us critter' is the wordplay.
'wild' indicates anagramming the letters.
'us'+'critter'='uscritter'
'uscritter' with letters rearranged gives 'STRICTURE'.
(Other definitions for stricture that I've seen before include "Constraint" , "Sternly critical remark" , "Abnormal medical narrowing" , "An adverse criticism" , "Limitation or hostile criticism" .)