Crossword Genius

Good man leaves lawyer railing (7)

Ross

I believe the answer is:

barrier

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

'railing' is the definition.
(I've seen this before)

'good man leaves lawyer' is the wordplay.
I cannot really see how this works, but
'man' could be 'barrie' and 'barrie' is found within the answer.
A single letter 'r' remains which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for barrier that I've seen before include "dam" , "it's soundly broken!" , "Obstacle that prevents entrance" , "Blockade, railing" , "Obstacle to movement" .)

I've seen this clue in The Hindu.
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