The most common and most likely answer to this crossword clue is the 7 letter word EARLESS
I've seen this crossword clue in Independent
E
A
R
L
E
S
S
More clues leading to the result EARLESS
- Van Gogh was halfway to being this brave, having lost head
- Female aristocrat perhaps lacking sense
- Extremely brave female leaves, having no listeners
- Unable to hear, brave female left
- Daring force to leave could be lacking in sense?
- Head back, St Trinian’s creator’s unable to hear
- Like Van Gogh, producing French art around his work place
- Somewhat like Van Gogh in the Arles series
- Seals ostensibly are so brave when force unleashed
- Don’t pick up so much stuff in Bow, being thus?
Buddy explains!

The straight part
We know that "Van Gogh was halfway to being this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case van gogh was halfway to being this = earless.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.