A vessel to sink? (7)
I believe the answer is:
scuttle
'sink?' is the definition.
(to deliberately sink a ship)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for scuttle that I've seen before include "Hurry away or sink a ship" , "Sink one's ship deliberately" , "container carrying coal?" , "receptacle for nuts" , "dish?" .)