Familiar, identified (5)
I believe the answer is:
known
This clue is a double definition.
'familiar' is the first definition.
(associated in meaning)
'identified' is the second definition.
(similar in meaning)
(Other definitions for known that I've seen before include "Recognised, familiar" , "Noted" , "Apprehended mentally" , "Widely recognized" , "Widely recognised" .)