Shift ends in discord for the docks workers (5)
I believe the answer is:
dress
'shift' is the definition.
(shift can mean a dress)
'ends in discord for the docks workers' is the wordplay.
'ends in' suggests the final letters.
The last letters of 'discord for the docks workers' are 'DRESS'.
(Other definitions for dress that I've seen before include "One-piece garment" , "items to wear" , "get into gear" , "Robe" , "clean > bandage" .)