The most common and most likely answer to this crossword clue is the 6 letter word IMPEDE
I've seen this crossword clue in Financial Times
I
M
P
E
D
E
More clues leading to the result IMPEDE
- Hinder troublemaker editor initially employed
- Heading off, hobbled with little energy — cramp?
- Hold up one troublemaker needing to meet PM shortly
- Obstruct young devil facing garden no end
- Slim pedestrian carrying hamper
- Block that is housing politician and journalist
- Limped everywhere, hiding shackle
- Bar — one’s p-paradise almost!
- Hamper suspect emptied: tea said to be missing
- I’m with editor, tucking into contents of open hamper
Buddy explains!

The straight part
We know that "Obstruct" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case obstruct = impede.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 IMPEDE mean?
IMPEDE verb- To get in the way of; to hinder.