Horseless champion succeeded in love (4)

I believe the answer is:

eros

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

'in love' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for eros that I've seen before include "Arrow shooter" , "asteroid four hundred and thirty three" , "Arrow-shooting god" , "One worshipped" , "Pagan god" .)

I've seen this clue in The Independent and The Times.

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