Demand professional appearance (9)

I believe the answer is:

provision

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'demand' is the definition.
(thesaurus)

'professional appearance' is the wordplay.
'professional' becomes 'pro' (abbreviation).
'appearance' becomes 'vision' (I can't justify this - if you can you should give a lot more credence to this answer).
'pro'+'vision'='PROVISION'

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(Other definitions for provision that I've seen before include "facilities" , "Catering" , "Supply; condition" , "Keep supplied" , "prior measures made" .)

I've seen this clue in The Times.

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