An apparatus comprising means for obtaining a first radio signal, which is a first composite signal and is comprised in a first set of radio frequency bands comprising a first plurality of radio frequency bands, and a second radio signal, which is a second composite signal and is comprised in a second set of radio frequency bands comprising a second plurality of radio frequency bands, wherein the first set of frequency bands is a first subset of a third set of frequency bands, and the second set of frequency bands is a second subset of the third set of frequency bands; performing a first preview processing to the first radio signal and a second preview processing to the second radio signal; determining a first envelope signal based on the preview processed first radio signal and a second envelope signal based on the preview processed second radio signal; determining a preview envelope signal based on the first envelope signal and the second envelope signal; determining a common clipping gain signal based on the preview envelope signal; determining a first clipping gain signal, that is a first constrained clipping gain signal in accordance with a first constraint that is a limiting constraint applied to the first set of radio frequency bands, based on the common clipping gain signal and a first weighing factor; determining a second clipping gain signal, that is a second constrained clipping gain signal in accordance with a second constraint that is a normalizing constraint applied to the second set of radio frequency bands, based on the common clipping gain signal and a second weighing factor; performing a first crest factor reduction for the first radio signal utilizing the first clipping gain signal; and performing a second crest factor reduction for the second radio signal utilizing the second clipping gain signal. obtaining a first radio signal, which is a first composite signal and is comprised in a first set of radio frequency bands comprising a first plurality of radio frequency bands, and a second radio signal, which is a second composite signal and is comprised in a second set of radio frequency bands comprising a second plurality of radio frequency bands, wherein the first set of frequency bands is a first subset of a third set of frequency bands, and the second set of frequency bands is a second subset of the third set of frequency bands; performing a first preview processing to the first radio signal and a second preview processing to the second radio signal; determining a first envelope signal based on the preview processed first radio signal and a second envelope signal based on the preview processed second radio signal; determining a preview envelope signal based on the first envelope signal and the second envelope signal; determining a common clipping gain signal based on the preview envelope signal; determining a first clipping gain signal, that is a first constrained clipping gain signal in accordance with a first constraint that is a limiting constraint applied to the first set of radio frequency bands, based on the common clipping gain signal and a first weighing factor; determining a second clipping gain signal, that is a second constrained clipping gain signal in accordance with a second constraint that is a normalizing constraint applied to the second set of radio frequency bands, based on the common clipping gain signal and a second weighing factor; performing a first crest factor reduction for the first radio signal utilizing the first clipping gain signal; and performing a second crest factor reduction for the second radio signal utilizing the second clipping gain signal.