The most common and most likely answer to this crossword clue is the 7 letter word PORSCHE
I've seen this crossword clue in The Guardian
P
O
R
S
C
H
E
Buddy explains!
The straight part
We know that "driven by friends of 22 22 across" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case driven by friends of 22 22 across = porsche.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.