### Clue: U-boats surprisingly come on shore in African monarchy (10)
### Answer: BASUTOLAND 
 ### Explanation: U-boats surprisingly come on shore in African monarchy (10)
***(u-boats)** + **LAND** ("come ashore") 
*It would certainly have been a surprise to see U-boats land in a landlocked country (Basutoland was the pre-independence name of Lesotho)