Possible Clues:

• Belmont Park action
• A few chips, perhaps
• See 35-Across
• One may need settling
• Back a horse
• Place this on course
• The odds are that with an additional wee N one would not have got to the end of it
• Risky thing to make, perhaps
• 'Stake, wager (3)'
• Play the point spread, e.g.