Crossword Genius

Who may upset Rick? (6)

Ross

I believe the answer is:

haymow

'rick?' is the definition.
(thesaurus)

'who may upset' is the wordplay.
'upset' indicates anagramming the letters.
'who'+'may'='whomay'
'whomay' with letters rearranged gives 'HAYMOW'.

I've seen this clue in The Times.
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