Get better cure with repeat treatment (10)
I believe the answer is:
recuperate
'get better' is the definition.
('recuperate' can be a synonym of 'get better')
'cure with repeat treatment' is the wordplay.
'with' says to put letters next to each other.
'treatment' is an anagram indicator.
'cure'+'repeat'='curerepeat'
'curerepeat' anagrammed gives 'RECUPERATE'.
(Other definitions for recuperate that I've seen before include "Recover from an illness" , "Get better" , "Convalesce" , "Rally, recover" .)