A scoop for a gardening correspondent? (6)

I believe the answer is:

trowel

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But I can't explain it at all! Could you help me understand?

(Other definitions for trowel that I've seen before include "Potting tool" , "Small triangular tool for weeding in garden" , "Brickie holds it" , "Small hand tool for gardening" , "Plastering tool" .)

I've seen this clue in The Globe and Mail.

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