More like a judge than a lord (5)

I believe the answer is:

sober

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'more' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I don't see?

I can't explain the remainder of the clue.

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(Other definitions for sober that I've seen before include "Unfuddled" , "Sedate and rational" , "On the wagon" , "Abstemious in robes" , "In control of one's faculties" .)

I've seen this clue in the Evening Standard.

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