### Clue: Brass decoration for gold on doctor's large uniform (6)
### Answer: ORMOLU 
 ### Explanation: Definition: Brass decoration
 OR(gold or yellow in heraldry) **placed above**(on, in a down clue) MO(abbrev. for "medical officer", a doctor in the military, say) **plus**(…'s, contraction of "has") L(abbrev. for "large") + U(abbrev. for "uniform").