The most common and most likely answer to this crossword clue is the 6 letter word BOGART
I've seen this crossword clue in Financial Times
B
O
G
A
R
T
More clues leading to the result BOGART
- Graffiti in the gents showing actor
- Garbo, curiously, beginning to tease US actor
- Old film star that Banksy might do in a toilet?
- Smallest room with pictures showing film star
- Garbo, wickedly, beginning to tease famous actor
- Film star comes from Slough works
- Hollywood star, one of 12 drinking G&T
- Famous player responsible for graffiti in the gents?
- Tough-guy actor seen in Duchamp’s fountain perhaps?
- Slough’s put on pictures showing American actor
Buddy explains!

The straight part
We know that "famous actor" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case famous actor = bogart.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 BOGART mean?
BOGART noun- An obnoxious, selfish and overbearing person; an attention hog.
- To selfishly take or keep something; to hog; especially to hold a joint (marijuana) dangling between the lips instead of passing it on.
- To get something by bullying, intimidation; be a tough guy.