Lock head of state away after uprising (5)
I believe the answer is:
tress
'lock' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
(Other definitions for tress that I've seen before include "Braid of hair" , "Bit of hair" , "Switch" , "Long lock or plait of hair" , "is a bit of a shock" .)