### Clue: Girl needs a soft drink, somehow going from do to do (8)
### Answer: DIATONIC 
 ### Explanation: Definition: going from do to do
 DI(short for the girl's name Diana) **plus**(needs) A + TONIC(short for tonic water, non-alcoholic and carbonated, or, in New England, a non-alcoholic carbonated sweet drink).
Defn: … on the major or minor musical scale, from do/doh/doe? through re, me, fa, so, la, ti, and back to do.