The most common and most likely answer to this crossword clue is the 3 plus 4 letter word MAE WEST
I've seen this crossword clue in The Guardian
M
A
E
W
E
S
T
More clues leading to the result MAE WEST
- Ex-player squad held in stitch-up!
- An inflatable sheep found in Spar
- Part of sailing ship contains something woolly and life jacket
- Pole embracing female in sheepskin jacket
- Mums in fleeces wear dull swimwear with floats
- Support outstanding female actress
- Sheep hiding in ground cover, an airman’s lifesaver
- Actress having stitch in side, keeled over
- Pole rescuing female, a lifesaver
- Nuts about you, said film star
Buddy explains!

The straight part
We know that "film star" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case film star = mae west.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.