Verbal feistiness

Now we are looking on the crossword clue: Verbal feistiness.
it’s A 17 letters crossword puzzle definition. See the possibilities below.

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Possible Answers: SASS.

Random information on the term “SASS”:

Sass (Syntactically Awesome Stylesheets) is a stylesheet language initially designed by Hampton Catlin and developed by Nathan Weizenbaum.[1][2] After its initial versions, Weizenbaum and Chris Eppstein have continued to extend Sass with SassScript, a simple scripting language used in Sass files.
Taken from Wikipedia