Revealed a matted beard (5)

I believe the answer is:

bared

I'm a little stuck... Click here to teach me more about this clue!

'revealed' is the definition.
(I've seen this in another clue)

'a matted beard' is the wordplay.
'beard' can be anagrammed to 'BARED'.
But, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for bared that I've seen before include "Uncovered" , "Stripped" .)

I've seen this clue in the Evening Standard.

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