Kim Wexler's field on "Better Call Saul" (3)

I believe the answer is:

law

(Other definitions for law that I've seen before include "Rule imposed by authority" , "Collection of rules for a society" , "at 16 down [MAN UNITED]" , "Set of rules laid down by authority" , "Edict" .)

I've seen this clue in the LA Times.

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