Unqualified, not functioning properly (9)

I believe the answer is:

downright

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'unqualified' is the definition.
(thesaurus)

'not functioning properly' is the wordplay.
'not functioning' becomes 'down' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'properly' becomes 'right' (synonyms).
'down'+'right'='DOWNRIGHT'

Can you help me to learn more?

(Other definitions for downright that I've seen before include "Out-and-out" , "Frank" , "True" , "rank" , "blunt" .)

I've seen this clue in The Sun.

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