Depends on what that is.
If it's alt-enter, you can hit and hold the alt key while typing 0010 on the
numeric keypad (or even just hit ctrl-j).
You can use Chip Pearson's Cell View addin to find out the character it is:
http://www.cpearson.com/excel/CellView.htm
Once you know what it is, you could try the alt-#### to see if it works.
If it doesn't, you could use a macro to change it to a different character (|
maybe???). Then use that character in the data|Text to columns. (Import to one
column, change the character, and then do data|Text to columns).
Option Explicit
Sub cleanEmUp()
Dim myBadChars As Variant
Dim myGoodChars As Variant
Dim iCtr As Long
myBadChars = Array(Chr(13))
myGoodChars = Array("|")
If UBound(myGoodChars) <> UBound(myBadChars) Then
MsgBox "Design error!"
Exit Sub
End If
For iCtr = LBound(myBadChars) To UBound(myBadChars)
ActiveSheet.Cells.Replace What:=myBadChars(iCtr), _
Replacement:=myGoodChars(iCtr), _
LookAt:=xlPart, SearchOrder:=xlByRows, _
MatchCase:=False
Next iCtr
End Sub
If you're new to macros, you may want to read David McRitchie's intro at:
http://www.mvps.org/dmcritchie/excel/getstarted.htm