Take from the top? (6)
I believe the answer is:
behead
'take from the top?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for behead that I've seen before include "Execute on the block" , "Remove the crown" , "Remove cranium as in old execution" , "Knock one's block off!" , "Execute with axe as in olden days" .)