The most common and most likely answer to this crossword clue is the 9 letter word REACTANCE
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More clues leading to the result REACTANCE
Buddy explains!

The straight part
We know that "electrical phenomenon" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case electrical phenomenon = reactance.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does REACTANCE mean?
REACTANCE noun- (electrics) The opposition to the change in flow of current in an alternating current circuit, due to inductance and capacitance; the imaginary part of the impedance. Symbol: X.
- An emotional reaction in direct contradiction to rules or regulations that threaten or eliminate specific behavioral freedoms.