Passing maple, here in resort (9)
I believe the answer is:
ephemeral
'passing' is the definition.
(I know that passing can be written as ephemeral)
'maple here in resort' is the wordplay.
'in resort' indicates anagramming the letters (letters get re-sorted).
'maple'+'here'='maplehere'
'maplehere' is an anagram of 'EPHEMERAL'.
(Other definitions for ephemeral that I've seen before include "Having only brief existence" , "Short-lived, passing quickly" , "not going to last long" , "Transitory" , "Transient, fleeting" .)