Wash lance off (5)
I believe the answer is:
clean
'wash' is the definition.
(I've seen this before)
'lance off' is the wordplay.
'off' is an anagram indicator.
'lance' with letters rearranged gives 'CLEAN'.
(Other definitions for clean that I've seen before include "Devoid of dirt" , "Unspoiled" , "Remove dirt or stain" , "Clear (of drugs)" , "Squeaky?" .)