### Clue: Family member that's wearing glasses (7)
### Answer: SPECIES 
 ### Explanation: Definition: Family member
 I.E.(abbrev. of "id est"; that is) **contained in**(wearing) SPECS(short for spectacles; glasses to correct vision).
Answer: In biology, a species is one of a number that make up a genus, a number of which in turn make up a family, in taxonomic classification system.