Little resistance in Cockney’s birthplace we hear (3)

I believe the answer is:

ohm

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'little resistance' is the definition.
'ohm' can be an answer for 'resistance' (I've seen this before). I'm unsure of the 'little' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

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

I've seen this clue in The Times.

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