Thaw (4)
'thaw' is the definition.
(I know that thaw can be written as melt)
This is the entire clue.
(Other definitions for melt that I've seen before include "Dissolve with heat" , "Reduce from a solid to a liquid state" , "Liquefy; become tender" , "Turn to liquid" , "Become liquid by heating" .)
'thaw' is the definition.
(defrosting is a kind of thawing)
This is all the clue.
(Other definitions for defrost that I've seen before include "Make free of ice" , "Thaw (frozen food)" .)
'thaw' is the definition.
(I know that de-ice is a more specific form of thaw)
This is the entire clue.
(Other definitions for de-ice that I've seen before include "Make free from frost" , "thaw?" , "Remove frozen water" .)