The most common and most likely answer to this crossword clue is the 15 letter word ELECTRIFICATION
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More clues leading to the result ELECTRIFICATION
Buddy explains!

The straight part
We know that "outcome of charge" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case outcome of charge = electrification.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 ELECTRIFICATION mean?
ELECTRIFICATION noun- The act of electrifying, or the state of being charged with electricity.
- The adaptation (of a home, farm, village, city, industry, railroad) for electric power.