Cure (6)
'cure' is the definition.
(I know that cure can be written as remedy)
This is all the clue.
(Other definitions for remedy that I've seen before include "A cure, for disease or other ill" , "Countermeasure" , "Cure or redress" , "Treatment; redress" , "Medicine, treatment" .)
(Other definitions for heyday that I've seen before include "Period of one's greatest success" , "Period of greatest success and popularity" , "The time of greatest success or prosperity" , "Highest period in someone's career" , "golden age" .)
'cure' is the definition.
(I know that cure can be written as heal)
This is the entire clue.
(Other definitions for heal that I've seen before include "Cure, mend" , "Cure, make well" , "Make whole and healthy" , "Become healthy again" , "Make better" .)