Claims no drunk can display brevity (8)

I believe the answer is:

laconism

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

'display brevity' is the definition.
'laconism' can be an answer for 'brevity' (thesaurus). I am not certain of the 'display' bit.

'claims no drunk' is the wordplay.
'drunk' indicates anagramming the letters.
'claims'+'no'='claimsno'
'claimsno' with letters rearranged gives 'LACONISM'.

'can' acts as a link.

Can you help me to learn more?

(Another definition for laconism that I've seen is " Brevity in speech or writing; is no clam (anag.)".)

I've seen this clue in The Independent.

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