Like a judge rather than a lord (5)

I believe the answer is:

sober

I'm a little stuck... Click here to teach me more about this clue!

'like a judge' is the definition.
(I've seen this in another clue)

I don't understand the remainder of the clue.

(Other definitions for sober that I've seen before include "On the wagon" , "Serious; muted in colour" , "Sedate and rational" , "Unfuddled" , "Unaffected by drink" .)

I've seen this clue in the Evening Standard.

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