Cryptic crossword clue
Don has Charlie replacing loud electronic device 9

The most common and most likely answer to this crossword clue is the 9 letter word PROCESSOR

P
R
O
C
E
S
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Buddy explains!

The straight part
We know that "electronic device" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case electronic device = processor.
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 PROCESSOR mean?

PROCESSOR noun
  1. A person or institution who processes things (foods, photos, applications, etc.).
  2. A device which processes, which changes something (a computer processor, food processor, etc.).
  3. A central processing unit.
  4. A microprocessor.

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