Attack, not on the pavement (6)

I believe the answer is:

inroad

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'attack' is the definition.
(I know that inroad is a type of invasion)

I don't understand the rest of the clue.

(Other definitions for inroad that I've seen before include "One's intrusive" , "Offensive" , "Encroachment, intrusion" , "Foray" , "Ordain (anag.)" .)

I've seen this clue in The Daily Express.

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