Bottom’s bust — direction to jump from a cliff (9)
I believe the answer is:
tombstone
'jump from a cliff' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'bottom's bust direction' is the wordplay.
'bust' indicates anagramming the letters.
'direction' becomes 'ne' (NE is an example).
'bottoms' with letters rearranged gives 'tombsto'.
'tombsto'+'ne'='TOMBSTONE'
'to' is the link.
Can you help me to learn more?
(Other definitions for tombstone that I've seen before include "Does it display departure date" , "Memorial in churchyard - town in Arizona" , "Where to find epitaph" , "film location" , "Graveyard marker" .)