Clue: Zero information within feature about shares (7)
Answer: RATIONS
Explanation: Zero information within feature about shares (7)

**<=(NO** "zero" + **I** (information) *within* **STAR** ("feature") [*about*]
 

 
*I don't think I on its own can stand for "information". It can do in phrases such as IT (information technology) or compounds such as I-way (Information highway), but not on its own.