### Clue: Medication husband nicked from quay inside of marina (8)
### Answer: WARFARIN 
 ### Explanation: Definition: Medication
 "h"(abbrev. for "husband") **deleted from**(nicked from) "wharf"(a quay, where ships dock) + **middle 4 letters of**(inside of) "marina".
Defn: A blood anticoagulant used medicinally and as a rat poison.