Start trouser pockets (5)

I believe the answer is:

rouse

'start' is the definition.

'trouser pockets' is the wordplay.
'pockets' indicates a hidden word (pocket can mean to contain).
'ROUSE' can be found hidden inside 'trouser'.

(Other definitions for rouse that I've seen before include "Prod" , "Move" , "Waken" , "Stir up; excite" , "Cause to become awake" .)

I've seen this clue in The Independent.

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