### Clue: Agreed to go back on board ship with headless corpse for adventures (8)
### Answer: ODYSSEYS 
 ### Explanation: Definition: adventures
  Reversal(*to go back*) of YES(*agreed*) in(*on board*) SS(*ship*) +(*with*) ODY("body",*corpse* without initial letter,*headless*).
Defn:  *Adventures *over a prolonged period or distance, named after that of the Greek Odysseus aka Ulysses.