### Clue: Single awful sin, still? This could describe it (3,2,5)
### Answer: ONE IN SEVEN 
 ### Explanation: Definition: This could describe it
 ONE(single in number) + **anagram of**(awful) SIN + EVEN(still/to a larger degree, as in "it was even less than he had expected").
Defn: The "it" in the clue, ie. one of the seven deadly sins/a single awful sin.
A WIWD (wordplay intertwined with definition) clue.