Clean function can be called from VBA this way:
Range("A1").Value = Application.WorksheetFunction.Clean(Range("A1"))
However as written here, the CLEAN function was designed to remove the first 32 non-printing characters in the 7 bit ASCII code (values 0 through 31) from text. In the Unicode character set, there are additional nonprinting characters (values 127, 129, 141, 143, 144, and 157). By itself, the CLEAN function does not remove these additional nonprinting characters.
Rick Rothstein have written code to handle even this situation here this way:
Function CleanTrim(ByVal S As String, Optional ConvertNonBreakingSpace As Boolean = True) As String
Dim X As Long, CodesToClean As Variant
CodesToClean = Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, _
21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 127, 129, 141, 143, 144, 157)
If ConvertNonBreakingSpace Then S = Replace(S, Chr(160), " ")
For X = LBound(CodesToClean) To UBound(CodesToClean)
If InStr(S, Chr(CodesToClean(X))) Then S = Replace(S, Chr(CodesToClean(X)), "")
Next
CleanTrim = WorksheetFunction.Trim(S)
End Function