Move the work period (5)
I believe the answer is:
shift
I believe this clue is a double definition.
'move' is the first definition.
(I know that shift is a type of move)
'work period' is the second definition.
(I've seen this in another clue)
'the' acts as a link.
(Other definitions for shift that I've seen before include "Move from one position to another" , "Move; loose dress" , "Move; work period" , "underskirt" , "Change position" .)