Ambiguities that enable evasion of obligations (9)
I believe the answer is:
loopholes
'ambiguities that enable evasion of obligations' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for loopholes that I've seen before include "gaps in wall" , "Ways of evading a rule or contract" , "Legal ambiguities" , "Ways of evading rules, or slits in fort wall" , "Ambiguities that enable evasion of obligations" .)