The trendy dealer works with great care (6-9)
I believe the answer is:
tender-heartedly
'with great care' is the definition.
'the trendy dealer works' is the wordplay.
'works' is an anagram indicator (work can mean to twist or convulse).
'the'+'trendy'+'dealer'='thetrendydealer'
'thetrendydealer' with letters rearranged gives 'TENDER-HEARTEDLY'.
I've seen this clue in The Independent.
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