Username, perhaps (5)
I believe the answer is:
alias
(Other definitions for alias that I've seen before include "Also known as" , "Assumed identity" , "Handle that isn't genuine" , "one's assumed" , "stage name, perhaps" .)
I believe the answer is:
alias
(Other definitions for alias that I've seen before include "Also known as" , "Assumed identity" , "Handle that isn't genuine" , "one's assumed" , "stage name, perhaps" .)