Here are the possible solutions for what a successful racehorse may eventually be put out to clue
Answer
Clue
Relevancy
stud
Clue
What a successful racehorse may eventually be "put out to"
derbywinner
Clue
Successful racehorse
studfee
Clue
What a retired racehorse may bring in
infth
Clue
Just out of the money, as a racehorse
tba
Clue
Letters the Bluths put on the invitation to a fundraiser they couldn't think of a good cause for, which eventually became the fake disease they used to pocket all the donation money, on "Arrested Deve
rents
Clue
People may be put out if they're not put up
Definition
RENT, to hire
othello
Clue
"Put out the light, and then put out the light" speaker