Allowing leeway in how courier might be paid? (10)
I believe the answer is:
permissive
'allowing' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for permissive that I've seen before include "Like our society" , "granting authorisation" , "Lenient, indulgent" , "Liberal, broad-minded" , "Showing indulgence" .)