Vaporise (6)
(Other definitions for distil that I've seen before include "Evaporate, purify" , "Treat substance through heating and cooling to extract an essence - whiskey?" , "Extract the essential meaning of" , "Make (spirits)" , "It slid (anag.)" .)
'vaporise' is the definition.
(I know that vaporise can be written as evaporate)
This is the entire clue.
(Other definitions for evaporate that I've seen before include "Go from liquid to vapour" , "Turn into vapour, lose moisture" , "Disappear into thin air" , "Turn liquid to gas" , "vanish" .)