Abused tradesmen to walk out in protest? (11)
I believe the answer is:
demonstrate
'walk out in protest?' is the definition.
(a walk-out might be staged as a demonstration)
'abused tradesmen to' is the wordplay.
'abused' indicates anagramming the letters.
'tradesmen'+'to'='tradesmento'
'tradesmento' with letters rearranged gives 'DEMONSTRATE'.
(Other definitions for demonstrate that I've seen before include "Prove, show" , "Make a public protest" , "Review" , "Take part in public protest" , "English floozies returning, led by villainous character" .)