Move the end, or remove one at the top? (8)
I believe the answer is:
dethrone
'remove one at the top?' is the definition.
(as in dethroning a monarch)
'move the end or' is the wordplay.
'move' is an anagram indicator (I've seen 'moving' mean this).
'the'+'end'+'or'='theendor'
'theendor' is an anagram of 'DETHRONE'.
(Other definitions for dethrone that I've seen before include "Topple" , "Remove from power" , "Remove from rule" , "Remove from position" , "Unseat" .)