Not as strict when that's accepted by Her Maj (6)
I believe the answer is:
easier
'not as strict' is the definition.
Although both the answer and definition are comparative adjectives, I don't understand how they can define each other.
'when that's accepted by her maj' is the wordplay.
I cannot quite see how this works, but
'when' could be 'e' (I've seen this in other clues) and 'e' is found within the answer.
'that's' could be 'ie' and 'ie' is present in the answer.
'accepted' could be 'a' (financial abbreviation) and 'a' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for easier that I've seen before include "More facile" , "Less burdensome" , "More simple" , "Less complicated" , "More comfortable or less difficult" .)