Help me understand this grammar

a ella atraen las mujeres – women are attracted to her.

a ella le atraen las mujeres – she is attracted to women.

To me, the addition of the indirect object pronoun "le" seems redundant with "a ella" but obviously not: it is changing the meaning of the phrase in a very significant way. Can you help me understand what's going on here, grammatically?

submitted by /u/ElroyFlynn
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