Melt away (8)
I believe the answer is:
dissolve
'melt away' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for dissolve that I've seen before include "Finish" , "Break up or bring to a formal end" , "Pass into a solution" , "Annul (a marriage, etc)" , "Disperse or melt in liquid" .)