Laurel for one remaining fresh and vital (9)
I believe the answer is:
evergreen
I believe this clue is a triple definition!
'laurel for one' is the first definition.
(I've seen this before)
'remaining' is the second definition.
(thesaurus)
'fresh and vital' is the third definition.
(I've seen this before)
(Other definitions for evergreen that I've seen before include "Ivy, perhaps" , "Enduringly popular" , "Like Laurel" , "Pine for one" , "song that's been popular for a long time" .)