Crossword Genius

Cunning in trade cultivated (7)

Ross

I believe the answer is:

trained

'cultivated' is the definition.
('train' can be a synonym of 'cultivate')

'cunning in trade' is the wordplay.
'cunning' indicates anagramming the letters.
'in'+'trade'='intrade'
'intrade' anagrammed gives 'TRAINED'.

(Other definitions for trained that I've seen before include "Taught, educated" , "Taught (to do a job)" , "Did exercises" , "Schooled" , "Instructed - took aim" .)

I've seen this clue in The Telegraph.
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