Lively for one's age (though needing a shower!) (4)

I believe the answer is:

spry

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'lively for one's age' is the definition.
(I've seen this in another clue)

I don't understand the rest of the clue.

(Other definitions for spry that I've seen before include "Light on one's feet" , "Quick and agile" , "Still able to move lightly and fast" , "Lively (especially of an older person)" , "Nimble (for one's age?)" .)

I've seen this clue in The Independent.

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