Protective metal covering (6)

I believe the answer is:

armour

'protective metal covering' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for armour that I've seen before include "Suit of mail" , "Protective apparel" , "Protective covering made of metal" , "Protective clothing" , "Body plate" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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