unit of electrical current (6)

I believe the answer is:

ampere

'unit of electrical current' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for ampere that I've seen before include "Unit of currency" , "Current measure" , "Basic SI unit of electric current" , "Current analyst" , "Unit of electrical current" .)

I've seen this clue in The Guardian, The Telegraph and the Universal.

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