The most common and most likely answer to this crossword clue is the 11 letter word LIVE-STREAM
I've seen this crossword clue in The Guardian
L
I
V
E
-
S
T
R
E
A
M
Buddy explains!
The straight part
We know that "Transmit over the internet" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case transmit over the internet = live-stream.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.