Being worried, work longer hours? (8)
I believe the answer is:
restless
'being worried' is the definition.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for restless that I've seen before include "Ceaselessly in motion" , "Uneasy and agitated" , "Unable to sit still" , "Always on the move" , "Fidgetty" .)