Cunning leader removed from demo (4)
I believe the answer is:
arch
'cunning' is the definition.
(I've seen this in other clues)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for arch that I've seen before include "Inner part of foot" , "Self-consciously playful or teasing" , "Curved part of stone bridge, perhaps" , "Masonry construction for spanning an opening" , "Affectedly playful like curved structure" .)