Drawing second boat (6)
I believe the answer is:
sketch
'drawing' is the definition.
(sketch is a kind of drawing)
'second boat' is the wordplay.
'second' becomes 's' (common abbreviation).
'boat' becomes 'ketch' (ketch is a kind of sailing vessel).
's'+'ketch'='SKETCH'
(Other definitions for sketch that I've seen before include "draft" , "Outline - preliminary drawing" , "bit of a performance" , "result of quick draw?" , "Short humorous scene" .)