The most common and most likely answer to this crossword clue is the 4 plus 4 letter word ROAD SHOW
I've seen this crossword clue in Financial Times
R
O
A
D
S
H
O
W
More clues leading to the result ROAD SHOW
Buddy explains!
The straight part
We know that "Touring group" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case touring group = road show.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.