In 1492, it sailed the ocean blue (5)
I believe the answer is:
pinta
'in 1492 it sailed the ocean blue' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pinta that I've seen before include "early delivery?" , "vessel for Columbus?" , "Columbus's ship - some milk!" , "drink" , "Bottle of milk" .)