Arriviste in average location briefly (7)

I believe the answer is:

parvenu

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'arriviste' is the definition.
(I know that arriviste can be written as parvenu)

'average location briefly' is the wordplay.
'average' becomes 'par' (average score in golf).
'location briefly' becomes 'venu' (I can't justify this - if you can you should believe this answer much more).
'par'+'venu'='PARVENU'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for parvenu that I've seen before include "One newly risen to wealth or power" , "Newcomer" , "Arriviste" , "Nouveau riche" , "One coming" .)

I've seen this clue in The Times.

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