Named, we’re told, as having been seen (7)
I believe the answer is:
sighted
'seen' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for sighted that I've seen before include "Picked out" , "Not blind" , "with a view?" , "Seen" , "Viewers are" .)