Short fibre (5)

I believe the answer is:

brief

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

'short' is the definition.
(similar in meaning)

'fibre' is the wordplay.
'fibre' anagrams to 'BRIEF'.
However, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for brief that I've seen before include "Case given to a barrister" , "Concise; short-lived" , "Ephemeral" , "Instructions for barrister" , "scanty" .)

I've seen this clue in The Irish Independent.

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