Time-waster (5)
I believe the answer is:
idler
'time-waster' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for idler that I've seen before include "Lollard" , "Time waster" , "Lazybones; gear wheel" , "One who loafs about" , "Person who does no work" .)