Klebb maybe lurking inside shot pedestrian (7)

I believe the answer is:

prosaic

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'pedestrian' is the definition.
(I know that pedestrian can be written as prosaic)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for prosaic that I've seen before include "Lacking poetry" , "Lacking originality" , "Banal" , "Lacking wit or imagination, dull" , "Dull -- commonplace" .)

I've seen this clue in The Telegraph and The Times.

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