The most common and most likely answer to this crossword clue is the 6 plus 9 letter word ANIMAL MAGNETISM
I've seen this crossword clue in The Daily Telegraph
A
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M
A
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M
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M
More clues leading to the result ANIMAL MAGNETISM
- It's a quality iron horse should possess?
- Plate knocked over: drawer for it?
- Energy in giant mammals perverted sexual attraction
- What could have attracted Beauty to the Beast?
- Mammal teasing in incredibly powerful attraction
- Physical attractiveness of a polar bear?
- Zoo attraction? Polar bears might exert such a pull
- Mammals eating in broadcast may reveal it
- Drawing of polar bears?
- Form of attraction having curious mammalian tinges?
Buddy explains!

The straight part
We know that "Was it this attracting Beauty to the Beast?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case was it this attracting beauty to the beast? = animal magnetism.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.