Underlying principle (5)
I believe the answer is:
tenet
(Other definitions for tenet that I've seen before include "Key principle" , "Fundamental belief" , "Dogma or principle" , "Rule" , "That's the law" .)
I believe the answer is:
tenet
(Other definitions for tenet that I've seen before include "Key principle" , "Fundamental belief" , "Dogma or principle" , "Rule" , "That's the law" .)