One with a password (4)
I believe the answer is:
user
'one with a password' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for user that I've seen before include "One who exploits others" , "One getting benefit from" , "Ruse for employer" , "With 1a [NEW] he'll need different login" , "Tech support caller?" .)