The most common and most likely answer to this crossword clue is the 10 letter word WIRELESSES
W
I
R
E
L
E
S
S
E
S
Buddy explains!

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 WIRELESSES mean?
WIRELESSES noun- The medium of radio communication.
- Wireless connectivity to a computer network.
- A radio set.
- To send a message by wireless (by radio)