Pitcher throwing last of balls from gutter (4)

I believe the answer is:

ewer

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'pitcher' is the definition.
(I know that pitcher can be written as ewer)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for ewer that I've seen before include "Large pitcher" , "Large, wide-mouthed jug" , "A wide-mouthed water-jug" , "A wide-lipped jug" , "Water jug with wide mouth" .)

I've seen this clue in The Guardian.

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