Getting better, don't possibly include macho types (2,3,4)
I believe the answer is:
on the mend
'getting better' is the definition.
(on the mend means recovering from illness)
'don't possibly include macho types' is the wordplay.
'possibly' indicates an anagram.
'include' indicates putting letters inside.
'macho types' becomes 'hemen' (a he-man is a muscular man).
'dont' anagrammed gives 'ontd'.
'ontd' enclosing 'hemen' is 'ON THE MEND'.
(Other definitions for on the mend that I've seen before include "Recovering from an injury or illness" , "Looking up" , "convalescing" , "returning to health" , "Regaining health" .)