The Clip geoprocessing tool in the Analysis toolbox does not honor the field alias when the output is saved as a shapefile (.shp) if the input feature class is joined with a table.
Last Published: August 17, 2015ArcGIS for Desktop
Bug ID Number
August 5, 2015
November 24, 2020
ArcGIS for Desktop
After review by the development team, it has been determined that this issue is related to a known limitation with the software that lies outside of Esri's control. The issue's Additional Information section may contain further explanation.