Edit tenth headline about old mystery (5,2,3,4)

I believe the answer is:

death on the nile

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'mystery' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'edit tenth headline about old' is the wordplay.
'edit' indicates an anagram (I've seen 'edited' mean this).
'about' is an insertion indicator.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'tenth'+'headline'='tenthheadline'
'tenthheadline' with letters rearranged gives 'deathnthenile'.
'deathnthenile' enclosing 'o' is 'DEATH ON THE NILE'.

Can you help me to learn more?

(Other definitions for death on the nile that I've seen before include "Book" , "LITERATURE" .)

I've seen this clue in The Telegraph.

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