That erotic immortal (5)

Ross

I believe the answer is:

cupid

I'm a little stuck... Click here to teach me more about this clue!

'immortal' is the definition.
(I know that Cupid is Greek deity)

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

Can you help me to learn more?

(Other definitions for cupid that I've seen before include "boy with little bow" , "Roman Eros" , "armed youth" , "godlike figure" , "Roman god of love, child archer" .)

I've seen this clue in the Evening Standard.

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