Pithily illustrate a German mug? (5)

I believe the answer is:

stein

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'german mug?' is the definition.
(I've seen this in another clue)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for stein that I've seen before include "Gertrude __, avant-garde US author, d. 1946" , "Beer-mug" , "Inset (anag.)" , "German earthenware beer mug" , "Glass" .)

I've seen this clue in the Sydney Morning Herald.

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