The most common and most likely answer to this crossword clue is the 13 letter word INCOMMUNICADO
I've seen this crossword clue in The Times
I
N
C
O
M
M
U
N
I
C
A
D
O
Buddy explains!

The straight part
We know that "beyond contact" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case beyond contact = incommunicado.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 INCOMMUNICADO mean?
INCOMMUNICADO adjective- In a state or condition of inability or unwillingness to communicate.
- In a manner in which communication with outsiders is not possible, for either voluntary or involuntary reasons, especially due to confinement or reclusiveness.