Lost form due to a rise in temperature (6)
I believe the answer is:
melted
'lost' is the definition.
Both the definition and answer are adjectives. Maybe there's a link between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for melted that I've seen before include "Became liquid with heat" , "Became liquefied" , "Thawed" , "Changed from a solid to a liquid state" , "Liquefied by heating" .)