It has no smell or uses old ingredients (9)

I believe the answer is:

odourless

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'it has no smell' is the definition.
The definition suggests a singular noun but the answer is not.

'or uses old ingredients' is the wordplay.
'ingredients' indicates anagramming the letters.
'or'+'uses'+'old'='orusesold'
'orusesold' anagrammed gives 'ODOURLESS'.

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(Other definitions for odourless that I've seen before include "descriptive of clean air" , "Lacking smell" , "free from smell" , "Unscented" , "without bouquet" .)

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

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