A name to know (3)
I believe the answer is:
ken
I believe this clue is a double definition.
'a name' is the first definition.
'know' is the second definition.
(I've seen this in other clues)
'to' acts as a link.
(Other definitions for ken that I've seen before include "One's range of knowledge" , "Awareness" , "Identify; -- Livingstone" , "Notice" , "Know; man's name" .)