Cricket trophy after five hundred runs (6)
I believe the answer is:
dashes
'runs' is the definition.
(dash is a kind of run)
'cricket trophy after five hundred' is the wordplay.
'cricket trophy' becomes 'ashes' (I've seen this before).
'after' is a charade indicator (letters next to each other).
'five hundred' becomes 'd' ('D' can be a synonym of 'five hundred').
'ashes' after 'd' is 'DASHES'.
(Other definitions for dashes that I've seen before include "Strokes" , "Darts" , "Quick run or sudden rush" , "Long signals in Morse code" , "Runs fast with shades" .)