Sacred, containing land (4)

I believe the answer is:

acre

'land' is the definition.
(I've seen this before)

'sacred containing' is the wordplay.
'containing' says the answer is hidden in the clue.
'ACRE' is hidden within 'sacred'.

(Other definitions for acre that I've seen before include "4840 sq yds" , "Persistent tendency" , "Unit of land area" , "Care about the piece of land" , "Square measure of land" .)

I've seen this clue in The Mirror.

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