Son abandoning rough drawing of sailing boat (5)
I believe the answer is:
ketch
'sailing boat' is the definition.
(I've seen this before)
'son abandoning rough drawing' is the wordplay.
'son' becomes 's'.
'abandoning' suggests deleting specific letters.
'rough drawing' becomes 'sketch' (I've seen this before).
'sketch' with 's' taken out is 'KETCH'.
'of' acts as a link.
(Other definitions for ketch that I've seen before include "The craft" , "Small two-master sailing vessel" , "Small sailing vessel with two masts" , "Jack" , "Two-masted sailing vessel" .)