Trousers for marches (7)

I believe the answer is:

strides

I believe this clue is a double definition.

'trousers' is the first definition.
(slang for trousers)

'for marches' is the second definition.
('stride' can be a synonym of 'march')

(Other definitions for strides that I've seen before include "Walks, trousers (colloq.)" , "Takes great steps" , "Trousers; long steps" , "Trousers (Australian)" , "pants [STRINE]" .)

I've seen this clue in The Daily Express.

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