The most common and most likely answer to this crossword clue is the 11 letter word MACHIAVELLI
I've seen this crossword clue in The Guardian
M
A
C
H
I
A
V
E
L
L
I
More clues leading to the result MACHIAVELLI
- Cunning politician — I've a call with him arranged
- Unscrupulous man shows degree of speed, wanting evil woman back
- Philosopher, Greek character with central point heading off into country
- Writer about prince using computer I have changed, returned with complaint
- Very fast with classic greeting, Lord Lieutenant is not half conniving type
Buddy explains!
The straight part
We know that "Unscrupulous man" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unscrupulous man = machiavelli.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.