Christen, call (4)
I believe the answer is:
name
This clue is a double definition.
'christen' is the first definition.
(I know that christen is a more specific form of name)
'call' is the second definition.
(as in calling or naming someone something)
(Other definitions for name that I've seen before include "Appoint - famous person" , "By which one is known" , "Famous person; identify" , "Famous person; reputation" , "celebrity" .)