Odd bits of garden decent in French city (8)

I believe the answer is:

grenoble

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'french city' is the definition.
(city in southeastern France)

'odd bits of garden decent' is the wordplay.
'odd bits of' indicates alternate letters.
'decent' becomes 'noble' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The alternate letters of 'garden' are 'gre'.
'gre'+'noble'='GRENOBLE'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for grenoble that I've seen before include "European city" , "City of alpine France, capital of the Isere department" , "City of SE France" , "City of south-eastern France" , "French city and skiing centre" .)

I've seen this clue in The Telegraph.

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