High-ranking officials, orchestra members? (5)
I believe the answer is:
Here is my best explanation:
I believe this is a double definition.
'high-ranking officials' is the first definition.
(as in the phrase 'top brass')
'orchestra members?' is the second definition.
(Other definitions for brass that I've seen before include "Copper and zinc alloy", "Copper-zinc alloy", "Front", "memorial in church", "Nerve (but not of steel!)", "Yellowish alloy", "Alloy of copper and zinc", "One making a living from tricks", "It's there, if muck's there" and "Cheek - alloy".)