Referring maybe to crossing lacking interest (10)

I believe the answer is:

pedestrian

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'crossing lacking interest' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for pedestrian that I've seen before include "One walks around" , "Run-of-the mill" , "A person travelling on foot" , "Dull; walker" , "Dull, uninspired" .)

I've seen this clue in The Times.

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