Deduce from evidence one or sub-standard (8)

I believe the answer is:

inferior

'sub-standard' is the definition.
(I've seen this before)

'deduce from evidence one or' is the wordplay.
'deduce from evidence' becomes 'infer' (I've seen this before).
'one' becomes 'i' (Roman numeral).
'infer'+'i'+'or'='INFERIOR'

(Other definitions for inferior that I've seen before include "strictly for the birds" , "badly done?" , "Less important, valuable" , "not vintage" , "Subordinate" .)

I've seen this clue in the Sydney Morning Herald.

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