At uni, sail horribly fateful vessel (9)
I believe the answer is:
lusitania
'fateful vessel' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'at uni sail horribly' is the wordplay.
'horribly' indicates an anagram (a horribly wrong version of the letters).
'at'+'uni'+'sail'='atunisail'
'atunisail' anagrammed gives 'LUSITANIA'.
Can you help me to learn more?
(Other definitions for lusitania that I've seen before include "I nail us at the torpedoed liner" , "Ocean liner sunk in World War One" , "Liner sunk by U-boat in 1915" , "Doomed ship" , "part of Iberia" .)