Mullally skewers edgy liar describing feature of satellite (5)

I believe the answer is:

lunar

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'satellite' is the definition.
Although both the answer and definition are adjectives, I can't understand how one could define the other.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for lunar that I've seen before include "that could describe landscape with more than one mare" , "Appertaining to the moon" , "of a circling body" , "Pertaining to the moon" , "Related to the moon" .)

I've seen this clue in The Irish Times.

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