The best replacement for clean is power clean.

The best alternatives to clean are rated as following:
★★★★★  power clean
★★★★  sterile technique
★★★  sterile
★★  cleanse
★★  dirty bulk
★★  hang clean
★★  unclean
★★  chem dry
★  sanitary
★  snatch
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★  sanitize
★  clean gut
★  clean and jerk
★  sober
★  clean
★  laundry
★  wash
★  squat clean
★  replace fuel injectors
★  replace carpet
★  haskell
★  sterile wound care
★  shampoo
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  cleaned
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Your alternative for clean is not listed? Suggest!
Speaking about clean, one probably shouldn't forget about febreze.

Other search terms related to clean and their ratings are:
★★★★★ febreze
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clean
power clean
sterile technique