The most common and most likely answer to this crossword clue is the 11 letter word PICTURESQUE
I've seen this crossword clue in The Daily Telegraph
P
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T
U
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Buddy explains!

The straight part
We know that "attractive" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case attractive = picturesque.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 PICTURESQUE mean?
PICTURESQUE adjective- Resembling or worthy of a picture or painting; having the qualities of a picture or painting; pleasingly beautiful.
- Strikingly graphic or vivid; having striking and vivid imagery.