Camels graveyards? (8)
I believe the answer is:
ashtrays
'camels graveyards?' is the definition.
Although both the answer and definition are plural nouns, I don't see how they can define each other.
This is all the clue.
Can you help me to learn more?
(Other definitions for ashtrays that I've seen before include "smokers' necessities" , "Receptacles for smokers" , "where fags end up" , "Receptacles for tobacco detritus" , "butts in these?" .)