Left to be profligate (9)
I believe the answer is:
abandoned
I believe this is a double definition.
'left' is the first definition.
(abandoning is a kind of leaving)
'be profligate' is the second definition.
(I've seen this before)
'to' acts as a link.
(Other definitions for abandoned that I've seen before include "without any reservations at all" , "Given up?" , "Deserted; uninhibited" , "Left in the lurch, forsaken" , "Unrestrained" .)