Touchpad toucher (4)
I believe the answer is:
user
'touchpad toucher' 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 "Exploiter (of others)" , "One getting benefit from" , "Person employing something" , "Drug addict (informal)" , "With 1a [NEW] he'll need different login" .)