A little squirt? (3)
I believe the answer is:
oil
'a little squirt?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oil that I've seen before include "Greasy liquid" , "painting" , "Fluid lubricant" , "Viscous substance as lubricant" , "Thick liquid that doesn't dissolve in water" .)