Crossword Genius

Uncovered short flexes, sent twice for fix? (7,4)

Ross

I believe the answer is:

hornets nest

I'm a little stuck... Click here to teach me more about this clue!

'uncovered short' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'flexes sent twice for fix?' is the wordplay.
I cannot really see how this works, but
an anagram of 'sent' is 'nets' which is within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for hornets nest that I've seen before include "Big trouble!" , "hazardous situation" , "Stirred up it's dangerous" , "(Stir up a) violent reaction" , "Something not to be stirred up" .)

I've seen this clue in the Sydney Morning Herald.
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