The most common and most likely answer to this crossword clue is the 4 letter word SEEM
I've seen this crossword clue in The Times
S
E
E
M
More clues leading to the result SEEM
- Appear to understand spy chief
- Appear to notice favouritism, finally
- Notice Mike appear
- Spy and spymaster appear
- Appear in place of bishop, taking mass
- Notice a large number appear
- Appear right leaving simple point raised
- Appear to observe many
- Appear to understand source of malevolence
- Stitches in your ear appear
Buddy explains!

The straight part
We know that "appear" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case appear = seem.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 SEEM mean?
SEEM verb- To appear; to look outwardly; to be perceived as.
- To befit; to beseem.