One lawyer in casual dress beneath consideration (10)

I believe the answer is:

negligible

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'beneath consideration' is the definition.
(negligible can mean not worth considering)

'one lawyer in casual dress' is the wordplay.
'one' becomes 'I' (Roman numeral).
'lawyer' becomes 'bl' (Bachelor of Law).
'in' is an insertion indicator.
'casual dress' becomes 'neglige' (I am not sure about this - if you are sure you should believe this answer much more).
'i'+'bl'='ibl'
'ibl' placed into 'neglige' is 'NEGLIGIBLE'.

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(Other definitions for negligible that I've seen before include "Paltry" , "of no importance" .)

I've seen this clue in The Guardian.

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