Solutions Swift and spectacular has 8 entries with similar clues
- dynamiteSpectacular or dangerous person
- transformImprove by a spectacular change of appearance/attitude
- hotdoggingSpectacular freestyle skiing
- transfigureImprove by a spectacular change of appearance/attitude
- with-a-bangSuddenly or spectacularly
- extravaganzaAn elaborate and spectacular entertainment
- quantum-leapSudden spectacular advance
- come-a-cropperFail spectacularly