French coming in to reinvigorate Scottish town (7)

I believe the answer is:

renfrew

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'scottish town' is the definition.
(Renfrew is a town in Scotland)

'french coming in to reinvigorate' is the wordplay.
'french' becomes 'fr' (abbreviation).
'coming in to' indicates putting letters inside.
'reinvigorate' becomes 'renew' (I can't justify this - if you can you should believe this answer much more).
'fr' placed into 'renew' is 'RENFREW'.

Can you help me to learn more?

(Other definitions for renfrew that I've seen before include "Cried" , "Scottish royal burgh" , "Royal burgh nr. Glasgow" , "Town just west of Glasgow" , "Town near Glasgow" .)

I've seen this clue in The Independent.

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