Draw son disembarking sailing vessel (5)
I believe the answer is:
ketch
'sailing vessel' is the definition.
(I know that ketch is a type of sailing vessel)
'draw son disembarking' is the wordplay.
I cannot really see how this works, but
'draw' could be 'etch' (I've seen this before) and 'etch' is present in the answer.
A single letter 'k' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for ketch that I've seen before include "2-masted boat" , "Small two-master sailing vessel" , "Two-masted sailing vessel" , "Two-masted sailing ship" , "The craft" .)