Love last traces of jazz age ever so (4)
I believe the answer is:
zero
'love' is the definition.
(love is zero in tennis)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for zero that I've seen before include "Worthless person" , "Nothing - Japanese aircraft" , "Rock bottom" , "Nadir" , "Duck" .)