Crossword Genius

Retsina I served up is most watery (8)

Ross

I believe the answer is:

rainiest

'most watery' is the definition.

'retsina i served up' is the wordplay.
'served up' indicates an anagram.
'retsina'+'i'='retsinai'
'retsinai' is an anagram of 'RAINIEST'.

'is' is the link.

I've seen this clue in The Telegraph.
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