### Clue: Unlucky tsar shot by hostile revolutionary (3-7)
### Answer: ILL-STARRED 
 ### Explanation: Definition: Unlucky
 **Anagram of**(shot) TSAR **contained in**(by, as in "to enter by/through the back door") [ ILL(hostile, as in "ill will" or "ill feeling") + RED(a revolutionary;a leftist) ].