Wild flaw lessened in part (7)
I believe the answer is:
lawless
'wild' is the definition.
(I have seen 'Wild wild' mean 'lawless' so perhaps 'wild' could also mean 'lawless')
'flaw lessened in part' is the wordplay.
'in part' indicates the answer is hidden within the clue.
'LAWLESS' is hidden in the letters of 'flaw lessened'.
(Other definitions for lawless that I've seen before include "Ungoverned" , "Unruly - anarchic" , "Anarchic, without any controls" , "disobedient" , "Slew Sal for being criminal" .)