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Perry,
accomplished
in
form
of
cricket?
(7)
Perry, accomplished in form of cricket? (7)
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The definition is at the end of the clue.
How the clue works
Look at that: the singer Perry gives you KATY, and accomplished gives you DID, with "in" just gluing the two pieces together. Stick them side by side and you've got an insect that's a kind of cricket, which is exactly what form of cricket is pointing at.