Crossword Genius

Momentary electronics problem (5)

Ross

I believe the answer is:

short

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This might be a double definition.

'momentary' is the first definition.
(similar in meaning)

'electronics problem' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

Can you help me to learn more?

(Other definitions for short that I've seen before include "Limited in duration" , "Concise" , "Of small duration" , "Wanting" , "Cause to blow a fuse" .)

I've seen this clue in The Mirror.
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