Fool scheduled to seize power (4)
I believe the answer is:
dupe
'fool' is the definition.
(I know that fool can be written as dupe)
'scheduled to seize power' is the wordplay.
'scheduled' becomes 'due' (I've seen this in other clues).
'to seize' means one lot of letters goes inside another.
'power' becomes 'p' (symbol in physics).
'due' placed around 'p' is 'DUPE'.
(Other definitions for dupe that I've seen before include "One deceived, tricked" , "Deceive, trick" , "Swindle" , "Hoodwink, fool" , "Deceive, make fool of" .)