Paint thinner can spurt (5)
I believe the answer is:
turps
'paint thinner' is the definition.
(I've seen this before)
'can spurt' is the wordplay.
'can' indicates an anagram (I've seen 'canned' mean this (canned can mean drunk)).
'spurt' anagrammed gives 'TURPS'.
(Other definitions for turps that I've seen before include "Paintbrush cleaner" , "cleaning agent" , "Spirit used in paints" , "Brush-cleaning spirit" , "paint additive" .)