The most common and most likely answer to this crossword clue is the 10 letter word SIMULATION
I've seen this crossword clue in The Guardian
S
I
M
U
L
A
T
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N
More clues leading to the result SIMULATION
Buddy explains!
The straight part
We know that "Diving" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case diving = simulation.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 SIMULATION mean?
SIMULATION noun- Something that simulates a system or environment in order to predict actual behaviour.
- The process of simulating.
- A video game designed to convey a more or less realistic experience, as of a sport or warfare.
- Assuming an appearance which is feigned, or not true.
- The act of falling over in order to be awarded a foul, when no foul has been committed.