Crossword Genius

Spoke, being agile (4)

Ross

I believe the answer is:

spry

'agile' is the definition.
(synonyms)

I can't explain the remainder of the clue.

(Other definitions for spry that I've seen before include "'Agile, nimble (4)'" , "Moving quickly and lightly" , "Still able to move lightly and fast" , "Sprightly" , "Fleet" .)

I've seen this clue in The Guardian.
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