### Clue: Slid down to swamp on rearing horse, encountering disaster initially (10)
### Answer: TOBOGGANED 
 ### Explanation: Definition: Slid down
A charade of 'to' plus BOG ('swamp', noun) plus GAN, a reversal ('rearing', in a down light) of NAG ('horse') plus ED ('**E**ncountering **D**isaster initially').