The most common and most likely answer to this crossword clue is the 10 letter word EMBARGOING
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Buddy explains!

The straight part
We know that "Will lead to sanctioning" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case will lead to sanctioning = embargoing.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 EMBARGOING mean?
EMBARGOING verb- To impose an embargo on trading certain goods with another country.
- To impose an embargo on a document.