expletory
/ˌeksplɪˈtɒri, ˈeksplɪtɔri/Definitions
1. adjective
relating to, or serving as, an expletive; explanatory or explanatory
“The expletory remarks were used to clarify any misunderstandings.”
2. noun
a word or phrase used to explain or gloss an ambiguous or obscure expression
“The expletory phrase ‘for all intensive purposes’ is often used as a humorous alternative.”