Control Spooner’s sweaty fool (9)
I believe the answer is:
clampdown
'control' is the definition.
(clampdown is a kind of control)
I don't understand how the remainder of the clue works.
(Other definitions for clampdown that I've seen before include "suppression" , "Restrictive practice" , "Sudden restriction on an activity" , "stopper?" , "restrictive measure" .)