Give up power (4)
I believe the answer is:
kick
I believe this clue is a double definition.
'give up' is the first definition.
(kicking is a kind of giving up)
'power' is the second definition.
(I've seen this before)
(Other definitions for kick that I've seen before include "Boot, thrill of pleasure" , "Thrill of excitement" , "Hit with foot" , "Put the boot in?" , "Give up" .)