The most common and most likely answer to this crossword clue is the 7 letter word LIKABLE
I've seen this crossword clue in The Times
L
I
K
A
B
L
E
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 = likable.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 LIKABLE mean?
LIKABLE adjective- Capable of being liked.
- (of a person) Having qualities tending to result in being liked; friendly, personable.