Drush field-clone with specified label The following command clones the field with the same label.

drush field-clone field_tags newtags




As you see, the cloned field has the same title Tags. 

So how can I clone the existing field with desired label?
Based on the help for this command I'd say it is not possible:

$ drush help field-clone
Clone a field and all its instances.

Examples:
 field-clone tags labels                   Copy 'tags' field into a new field 'labels' field which has same 
                                           instances.                                                       
 open `field-clone tags labels`            Clone field and then open field edit forms for refinement.

Arguments:
 source_field_name                         Name of field that will be cloned 
 target_field_name                         Name of new, cloned field.


Edit: This GitHub issue can confirm it.

But you can always go to Manage Fields, edit the new field and change its name.