Sub Demo()
Dim Rng As Range: Set Rng = Selection.Range
With Selection
  With .Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .Replacement.Text = ""
    .Format = False
    .Forward = False
    .Wrap = wdFindContinue
    .MatchWildcards = False
    .Text = "+"
    .Execute
  End With
  If .Find.Found Then
    Rng.Start = .Start
    Rng.Characters.First.Delete
    Rng.Style = "Emphasis"
  End If
End With
End Sub