A storybook ending in Venice (5)
I believe the answer is:
death
'ending in venice' is the definition.
'death' can be an answer for 'ending' (death is a kind of ending). I'm not certain of the 'in venice' bit.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for death that I've seen before include "destruction" , "Distribute; wood" , "Hated (anag) - curtains (informal)" , "Loss of life" , "Hated (anag) -- expiry" .)