Cunning element in hierarchy (4)

I believe the answer is:

arch

'cunning' is the definition.
(I've seen this in other clues)

'element in hierarchy' is the wordplay.
'element in' says the answer is hidden in the clue (I've seen 'elements in' mean this (I've seen this in other clues)).
'ARCH' can be found hidden inside 'hierarchy'.

(Other definitions for arch that I've seen before include "a piece about a foot?" , "Knowing, sly" , "Roguish, teasing" , "Main" , "Consummate" .)

I've seen this clue in The Sun.

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