Lollygag
I believe the answer is:
loaf
'lollygag' is the definition.
(I know that lollygag can be written as loaf)
This is all the clue.
(Other definitions for loaf that I've seen before include "Idle - head" , "Spend time idly, having slang head" , "Portion of bread" , "loll" , "Pass time idly" .)