Clenched hand (4)
I believe the answer is:
fist
'clenched hand' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for fist that I've seen before include "Tightly-closed hand" , "Hit with a clenched one" , "or be decked in a ring" , "handwriting?" , "Punch dispenser" .)