Evergreen duchess's elegance pointed up somewhat (7)
I believe the answer is:
ageless
'evergreen' is the definition.
(evergreen can mean ageless or fresh)
'duchess's elegance pointed up somewhat' is the wordplay.
'somewhat' says the answer is hidden in the clue.
'up' says the letters should be written backwards (in down clue: letters go upwards).
'sselega' can be found hidden inside 'duchesss elegance pointed'.
'sselega' back-to-front is 'AGELESS'.
(Other definitions for ageless that I've seen before include "Classic" , "Staying young" , "Sea-legs (anag.)" , "not appearing to get old" , "Ever youthful" .)