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' means one lot of letters goes inside another.
'macho types' becomes 'hemen' (a he-man is a muscular man).
'dont' is an anagram of 'ontd'.
'ontd' placed around '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" .)