Crossword Genius

Physicist’s residence in Bow, do we hear? (3)

Ross

I believe the answer is:

ohm

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'physicist's' is the definition.
(Ohm is an example)

I can't explain the remainder of the clue.

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(Other definitions for ohm that I've seen before include "SI unit of electrical resistance" , "lawmaker" , "A little resistance" , "Unit of electrical resistance (3)" , "measure of resistance" .)

I've seen this clue in The Times.
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