The most common and most likely answer to this crossword clue is the 9 letter word SPELLBIND
I've seen this crossword clue in Financial Times
S
P
E
L
L
B
I
N
D
More clues leading to the result SPELLBIND
Buddy explains!

The straight part
We know that "entrance" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case entrance = spellbind.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 SPELLBIND mean?
SPELLBIND verb- To captivate, or hold the attention of, as if by a magic spell; to entrance.