$clientes = Cliente::orderBy('pessoa.nome', 'desc')->get();

// file START ommited
    'providers' => [
        // other providers ommited
        \Laraerp\Ordination\OrdinationServiceProvider::class,
    ],
    
    'aliases' => [
        // other aliases ommited
        'Order' => Laraerp\Ordination\Facade::class,
    ],
    
// file END ommited

use Laraerp\Ordination\OrdinarionTrait;

class Cliente extends Model{

  use OrdinationTrait;
  
  /*
   * Belong To Pessoa
   */
  public function pessoa(){
      return $this->belongsTo(Pessoa::class);
  }

}