| Answer | Crossword Clue |
|---|---|
| REL | Bound by blood: Abbr. |
| KIN | They're bound by blood |
| KIN | Ones bound by blood |
| hemoglobin | A red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a heme group |
| NSW | Abbr. on Sydney-bound mail |
| MSS | They may eventually be bound: Abbr. |
