Heavy sea wave meeting vessel — exciting ride? (13)
I believe the answer is:
rollercoaster
'vessel exciting ride?' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'heavy sea wave meeting' is the wordplay.
'heavy sea' becomes 'coaster' (I can't explain this - if you can you should believe this answer much more).
'wave' becomes 'roller' (roller is a kind of wave).
'meeting' is a charade indicator (letters next to each other).
'coaster' after 'roller' is 'ROLLERCOASTER'.
Can you help me to learn more?
(Other definitions for rollercoaster that I've seen before include "Big dipper" , "Fairground ride" , "fairground attraction" .)