Henri arranged flower in Germany (5)

I believe the answer is:

rhine

I'm a little stuck... Click here to teach me more about this clue!

'in germany' is the definition.
('Rhine' is part of 'germany')

'henri arranged flower' is the wordplay.
'henri' anagrams to 'RHINE'.
Though, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for rhine that I've seen before include "Ring river (Wagner)" , "Bonn's river" , "Great river that flows through Germany" , "Cologne's river" , "River of Cologne" .)

I've seen this clue in The Sun.

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