### Clue: Almost certain to aim at the queen after king's capitulation (9)
### Answer: SURRENDER 
 ### Explanation: Definition: capitulation
 "sure"(certain/definite) **minus ****its last letter**(Almost …) **plus**(to) [END(an aim/an objective) **plus**(at) [ER(abbrev. for Elizabeth Regina, the queen) **placed after**(after) R(abbrev. for "Rex", king in Latin)].