Repositories for rubbish clues (4)
I believe the answer is:
tips
'clues' is the definition.
(a tip is a hint or clue)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for tips that I've seen before include "Areas for dumping waste" , "Hints or gratuities" , "leavings in restaurant?" , "extra payments" , "Ends" .)