Telephone user (6)
I believe the answer is:
caller
(Other definitions for caller that I've seen before include "Someone phoning" , "One visits" , "One paying a brief visit" , "Visitor" , "Person on the line" .)
I believe the answer is:
caller
(Other definitions for caller that I've seen before include "Someone phoning" , "One visits" , "One paying a brief visit" , "Visitor" , "Person on the line" .)