Milk or paint, possibly (5)
I believe the answer is:
pinta
'milk' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'paint possibly' is the wordplay.
'possibly' is an anagram indicator.
'paint' anagrammed gives 'PINTA'.
'or' acts as a link.
Can you help me to learn more?
(Other definitions for pinta that I've seen before include "vessel for Columbus?" , "early delivery?" , "Bottle of milk" , "drink" , "Columbus's ship - some milk!" .)