### Clue: Desperate jockey's final obstacle? (4-5)
### Answer: LAST-DITCH 
 ### Explanation: Definition: Desperate
  In the steeplechase (the term originating from a race across country, going from church steeple to church steeple), a jockey's (and his horse's) final,last obstacle might well be a ditch. 
Answer: Adjective for a last-chance desperate attempt, such as a last-ditch negotiation.