Transient things (8)
I believe the answer is:
ephemera
'transient things' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ephemera that I've seen before include "Things that last a very short time" , "Mayfly - something short-lived" , "Transitory things, lasting only a short time" , "Flyer" , "They won't last long" .)