Crossword Genius

I arrive all dishevelled in the South of France (7)

Ross

I believe the answer is:

riviera

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'the south of france' is the definition.
The definition suggests a singular noun which matches the answer.

'i arrive all dishevelled' is the wordplay.
'i arrive' anagrams to 'RIVIERA'.
Though, I'm not clear how this is indicated.

'in' is the link.

Can you help me to learn more?

(Other definitions for riviera that I've seen before include "I arrive! (Anag)" , "Coastal area between Cannes and Italy" , "holiday destination" , "Coastal area between Italy and France" , "I arrive at French holiday area" .)

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