Breed with nympho, one frequently on course (8)

I believe the answer is:

racegoer

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'one frequently on course' is the definition.
The definition suggests a singular noun which matches the answer.

'breed with nympho' is the wordplay.
'breed' becomes 'race' (I've seen this before).
'with' is a charade indicator (letters next to each other).
'nympho' becomes 'goer'.
'race'+'goer'='RACEGOER'

Can you help me to learn more?

(Other definitions for racegoer that I've seen before include "One on course" , "Eg, one attending Derby" , "On track, perhaps better" , "Regular attender at, eg, Aintree or Epsom" , "Frequenter of 51 [ASCOT]" .)

I've seen this clue in The Telegraph.

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