The most common and most likely answer to this crossword clue is the 6 letter word ELUDED
I've seen this crossword clue in The Guardian
E
L
U
D
E
D
More clues leading to the result ELUDED
Buddy explains!

The straight part
We know that "Avoided" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case avoided = eluded.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 ELUDED mean?
ELUDED verb- To evade, or escape from someone or something, especially by using cunning or skill
- To shake off a pursuer; to give someone the slip
- To escape understanding of; to be incomprehensible to