Unfortunate event is confirmed in mismanagement of trades (8)
I believe the answer is:
disaster
'unfortunate event' is the definition.
'disaster' can be an answer for 'event' (disaster is a kind of event). I am not certain of the 'unfortunate' bit.
'is confirmed in mismanagement of trades' is the wordplay.
I cannot quite see how this works, but
'is' is present in the answer.
an anagram of 'trades' is 'daster' which is within the left over letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for disaster that I've seen before include "Extreme ruin or misfortune" , "Terrible calamity" , "terrible trouble" , "Calamity, sudden great misfortune" , "Great tradegy or cataclysm" .)