### Clue: More compact packing is preferable, primarily, for pharmacist (9)
### Answer: DISPENSER 
 ### Explanation: Definition: pharmacist
 DENSER(more compact;more squeezed into a smaller volume) **containing**(packing) [IS + **the 1st letter of**(…, primarily) "preferable "].
Defn: … or one who dispenses pharmaceuticals.