The idiom "piece of writing" refers to a written work or composition that is considered to be of high quality or excellence. It can also refer to a document or piece of literature that has been carefully crafted and is worthy of attention or consideration.

The idiom "make a virtue of necessity" means to turn a difficult or unpleasant situation into an advantage or positive outcome. It implies that the person is taking action in response to circumstances beyond their control and is finding a way to make the best of it.

The idiom "backroom boy(s)" refers to someone who works behind the scenes or in a back room, usually performing tasks that are not directly related to the main business or operations of an organization.

The idiom "go after" has two meanings:

• To pursue or chase someone or something.
• To confront or challenge someone or something directly.

The idiom "the buck stops here" means that the responsibility or blame for something rests on a person's shoulders, and that they are ultimately accountable for their actions.