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Enthusiasm (4 letter answer)
The answer ZING is uncommon, appearing about once every 575 puzzles.
Get in a good one on
Hurl a barb at
Hurl an insult at
Throw a barb at
Throw barbs at
Get but good
Sound of swift passage
"___ went the . . . of my heart"
ZING as a noun:
1. a brief high-pitched buzzing or humming sound; "the zing of the passing bullet"
2. (dynamism, pizzazz, pizzaz, oomph, zing) = the activeness of an energetic personality