Laugh with time left in job (7)
I believe the answer is:
chortle
'laugh' is the definition.
(I know this)
'with time left in job' is the wordplay.
'with' indicates putting letters inside.
'time' becomes 't' (abbreviation).
'left' becomes 'l' (common abbreviation).
'in' is an insertion indicator.
'job' becomes 'chore' (synonyms).
'l' placed into 'chore' is 'chorle'.
't' put inside 'chorle' is 'CHORTLE'.
(Other definitions for chortle that I've seen before include "Titter" , "Loud gleeful chuckle" , "Laugh gleefully" , "Laugh softly" , "Laugh out loud" .)