The most common and most likely answer to this crossword clue is the 10 letter word TRANSISTOR
I've seen this crossword clue in The Guardian
T
R
A
N
S
I
S
T
O
R
More clues leading to the result TRANSISTOR
- Radio station’s run repeated broadcast
- Radio station’s broadcast about reading — and writing?
- Electronic device starts iron working
- Broadcast right artists on radio
- Radio broadcast on artists close to Jagger
- Radio One declined in series on unfinished collection
- Radio star is torn, in other words
- Representing first of rap artists on radio
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 = transistor.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 TRANSISTOR mean?
TRANSISTOR noun- (semiconductors) A solid-state semiconductor device, with three terminals, which can be used for amplification, switching, voltage stabilization, signal modulation, and many other functions.
- A transistor radio.