The best replacement for clash is crash.

The best alternatives to clash are rated as following:
★★★★★  crash
★★★★★  ramones
★★★  sex pistols
★★  green day
★★  killers
★  clash
★  ninja
★  clash of clans
★  spyderco tenacious
  pistols
  stevie wonder
  clans
  jamaica world clash
  van halen

Your alternative for clash is not listed? Suggest!
Speaking about clash, one probably shouldn't forget about tim armstrong.

Other search terms related to clash and their ratings are:
★★★★★ tim armstrong
★★★ elmo
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Google Trends

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