The most common and most likely answer to this crossword clue is the 9 letter word METAVERSE
I've seen this crossword clue in The Guardian
M
E
T
A
V
E
R
S
E
Buddy explains!
The straight part
We know that "Where virtual reality experienced" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case where virtual reality experienced = metaverse.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 METAVERSE mean?
METAVERSE noun- A set or the composite of all universes.
- A hypothetical future (counterpart or continuation of the) Internet, created by the convergence of virtually enhanced physical reality and physically persistent virtual space.