Ice-covered railway station in the South of France (7)

I believe the answer is:

sugared

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'ice-covered railway' is the definition.
I can't judge whether this defines the answer.

'station in the south of france' is the wordplay.
'station' becomes 'gare' (I am not sure about this - if you are sure you should believe this answer much more).
'in the' indicates putting letters inside.
'south of france' becomes 'sud' (French for south).
'gare' placed into 'sud' is 'SUGARED'.

Can you help me to learn more?

(Other definitions for sugared that I've seen before include "Sweetened" , "Sweetly coated (almond)" .)

I've seen this clue in The Globe and Mail.

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