How can you point to its gender without sounding ambiguous?

The gender of it.

The gender of it, the pronoun.

The gender of the pronoun it.

Its gender is genderless.

It has no gender (in English).

Gender has no gender.

Gender is neuter.

Gender is genderless.

Its gender is irrelevant.

So the clue would have to be "Its gender in another language."

"Its gender", in English, does not exist, so the clue is meaningless....it's beyond oxymoronic, it excludes itself.