The most common and most likely answer to this crossword clue is the 2 plus 7 letter word IN CAHOOTS
I've seen this crossword clue in The Guardian
I
N
C
A
H
O
O
T
S
More clues leading to the result IN CAHOOTS
- Old Peruvian amusing people working together
- Comedian taken in by old Americans working together
- California-located, hilarious people working together
- I soon chat freely, as part of a conspiracy
- Funny person seen among South Americans colluding
- Partnership identified when supply chain foundation is reduced by 20%
- Conspiring Peruvian calls in the dark
- Conspiring old Peruvian makes heckling sounds
- d Together plotting reaction to superb ‘old people’ gag?
Buddy explains!
The straight part
We know that "as part of a conspiracy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case as part of a conspiracy = in cahoots.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.