The most common and most likely answer to this crossword clue is the 4 letter word MIEN
I've seen this crossword clue in Financial Times
M
I
E
N
More clues leading to the result MIEN
- Lowly-sounding bearing
- Speaker's shabby appearance
- Appearance of soldiers capturing island
- Upright character among crew makes appearance
- Appearance that is evident in heartless fellow
- Shabby-sounding appearance
- Unpretentious-sounding carriage
- Auditor’s humble appearance
- People adopting independent manner
- Look! Wanderer’s name-dropping!
Buddy explains!

The straight part
We know that "Look" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case look = mien.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 MIEN mean?
MIEN noun- Demeanor; facial expression or attitude, especially one which is intended by its bearer.
- A specific facial expression.