Crossword Genius

More than one tree expert goes stealing nuts (12)

Ross

I believe the answer is:

genealogists

'more than one tree expert' is the definition.
(genealogists use family trees)

'goes stealing nuts' is the wordplay.
'nuts' indicates anagramming the letters (nuts can mean crazy).
'goes'+'stealing'='goesstealing'
'goesstealing' anagrammed gives 'GENEALOGISTS'.

I've seen this clue in The Times.
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