Crossword Genius

Walk half a mile as you crush things underfoot (7)

Ross

I believe the answer is:

trample

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'you crush things underfoot' is the definition.
I can't judge whether this definition defines the answer.

'walk half a mile' is the wordplay.
'walk' becomes 'tramp' (tramp can mean to walk around).
'half a' indicates taking half.
'mile' with half the letters taken is 'le'.
'tramp'+'le'='TRAMPLE'

'as' acts as a link.

Can you help me to learn more?

(Other definitions for trample that I've seen before include "Walk heavily or roughly" , "Flatten" , "Tread roughly underfoot" , "One of the Simpsons" , "Heedlessly tread down" .)

I've seen this clue in the Evening Standard.
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