The most common and most likely answer to this crossword clue is the 4 plus 4 letter word FILM STAR
F
I
L
M
S
T
A
R
More clues leading to the result FILM STAR
- Actor with sheet sings from the bottom
- Actor who needs projection to reach his audience
- Celebrity flirts with a maiden initially — naughty!
- Actor shoots sailor
- Screen idol shoots sailor
- One whose pictures attract lots of admiration
- Blended malts kept in tree for screen goddess
- Rake flirts with a married heroine
Buddy explains!

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