See LA police officer turning up after a catastrophe (10)
I believe the answer is:
apocalypse
'a catastrophe' is the definition.
(I know that Apocalypse is a type of catastrophe)
'see la police officer turning up' is the wordplay.
'see' becomes 'espy' (to espy is to catch sight of it).
'police officer' becomes 'copa' (I can't justify this - if you can you should believe this answer much more).
'turning up' says the letters should be written backwards.
'espy'+'la'+'copa'='espylacopa'
'espylacopa' reversed gives 'APOCALYPSE'.
'after' acts as a link.
Can you help me to learn more?
(Other definitions for apocalypse that I've seen before include "End of the world" , "prophetic disclosure" , "terrible event" , "This last book" , "Revelation" .)