Answer:

procrastination

Answer	Crossword Clue
PROCRASTINATION	Thief of time.
PROCRASTINATION	"The thief of time."
PROCRASTINATION	Hamlet's weakness

PROCRASTINATION	Possible cause for dismissal
PROCRASTINATION	Scarlett's form of escapism
PROCRASTINATION	"Thief" in a proverb
PROCRASTINATION	Habit of delaying
PROCRASTINATION	Proverbial "thief"
PROCRASTINATION	Start of a quotation
PROCRASTINATION	The thief of time
PROCRASTINATION	Subject of a definition by Don Marquis

PROCRASTINATION	The art of putting things off
PROCRASTINATION	Cunctation
PROCRASTINATION	Start of a slacker's quip
PROCRASTINATION	Start of a quip about putting things off