Wreck of the Bismarck (3)
I believe the answer is:
mar
'wreck' is the definition.
(I've seen this before)
'of the bismarck' is the wordplay.
'of' says the answer is hidden in the clue.
'MAR' is hidden in the letters of 'bismarck'.
(Other definitions for mar that I've seen before include "Blemish" , "A windy month" , "Oh dear!" , "Spoil or deface" , "hurt" .)