In brief, it can blow a fuse (5)

I believe the answer is:

short

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'in brief' is the definition.
'short' can be an answer for 'brief' (synonyms). I am unsure of the 'in' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for short that I've seen before include "Having little length" , "Terse; in insufficient supply" , "Literary genre such as those by ..." , "Of small length" , "Wanting" .)

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