Narcissistic (4)
I believe the answer is:
vain
'narcissistic' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for vain that I've seen before include "Having too much pride in one's appearance" , "Conceited and ineffectual" , "Conceited - or a waste of time" , "Concieted or pointless" , "is full of himself" .)