Saving time? (5,3)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
rainy day
(Other definitions for rainy day that I've seen before include "Save for this future time" , "When savings may be needed" , "One should save money for a . . . . . . . . - may need it to buy umbrella" , "Wet time" , "One saves up for it" .)