The most common and most likely answer to this crossword clue is the 7 letter word CHARMER
I've seen this crossword clue in The Daily Telegraph
C
H
A
R
M
E
R
More clues leading to the result CHARMER
- One with winning ways, church member I hesitate to say
- Dear Parisian entertaining member, one out to impress?
- Daily Mail’s No.1 royal Romeo
- Womaniser putting arm around actress? The other way round
- Person seducing American songstress reserves a room
- Daily Mail has no trouble covering top royal Lothario?
- Daily describes Romeo Hoskins as sweet talker
- Singer entertaining a jolly fascinating sort?
- Belle has tea by sea in Marseilles
- Church member meeting the Queen is a smoothie
Buddy explains!

The straight part
We know that "fascinating sort" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fascinating sort = charmer.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 CHARMER mean?
CHARMER noun- A charming person; one who charms or seduces; a smoothie.
- An enchanter or magician.