This is a type of context clues which adds a few synonyms, or words with similar meanings if you can't decipher a meaning.

What type of context clue is this "It was an idyllic day - sunny, warm, and perfect for a walk in the park."

A type of Context Clues on which a word or a phrase is explained immediately after its use.

In this type of Context Clues, the  author uses words and  phrases that have the same or  similar meaning as an  unfamiliar word. It uses the words 'like', 'as', 'likewise'.. etc.

This is a type of context clue which the author provides examples  or additional explanations or  summaries to help you  understand an unfamiliar  word. The word is cleared up  by giving an example. 

This type of Context Clue which the author uses another word  or phrase that means the  opposite of an unfamiliar  word 

The meaning of an unknown  word depends on the  cause/effect relationship with  other words in the text.

Martha is a curator, a person who is  responsible for looking after a museum’s  collection. 

curator means...

My brother is enthralled by birds similar to the  way that I am fascinated by insects

enthralled means...

He knew his future was precarious and likely to fall apart.

Precarious means...

"Lou was sent to the haberdashery to find a new suit. He needed to wear one for his uncle’s wedding."

haberdashery means..

The manager wanted a weekly inspection, which is a methodical examination of all the equipment.

Inspections means "a careful examination"

The stench of the old shoes was like the smell of  garbage.

Stench means pleasant smell

My best friend squandered all his money; his  drinking and gambling wasted all his earnings.

Squandered means saving money