Crossword Genius

Aboard pedalo, Eve rationed sunburn remedy (4,4)

Ross

I believe the answer is:

aloe vera

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'remedy' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

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

Can you help me to learn more?

(Other definitions for aloe vera that I've seen before include "cosmetic juice" , "Plant juice used in cosmetics" , "Cosmetic plant extract" , "Mediterranean plant whose thick leaves give off a soothing juice" , "Succulent" .)

I've seen this clue in The Telegraph.
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