Days past (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
yore
'days past' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yore that I've seen before include "Bygone time" , "Time long past" , "Times past" , "Time long ago" , "Long ago (poetic)" .)