Possible Clues:

• Derby racecourse - salts
• Sheep sometimes gathering where horses run?
• __ salts: bathwater additive
• One downs these salty ones
• Salts might go down here, downs here
• Downs spot
• Brit racing town
• Some demos persistently held up racing here?
• Poems rewritten for old salts
• Move aimlessly about, going round southern English town