Get better (7)
'get better' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for improve that I've seen before include "Make progress" , "Get or make better" , "pick up" , "Make better in quality" , "Polish" .)
'get better' is the definition.
(synonyms)
This is all the clue.
(Other definitions for heal that I've seen before include "Make whole and healthy" , "Restore to health" , "Get well again" , "Get healthy again" , "Of wound, mend and get better" .)