SQL Server BCP export to CSV

All the searches and posts I've come across use the following to export data to a CSV file, how ever I can't get it to work.

Here's a wrinkle, the file doesn't exist, the export has to create it.  

How do I get BCP export to create the file and write data ???

I've created a #temp table with the records and now I need to use a select statement to get a single record from the #temp and create and write the file.  How do i do this??

This is being done from within a proc.


Create Table #Temp
(
[  ..]
fields..
)

Declare @CSVexport varchar(8000)
set @CSVexport = 'BCP select
      [Fld 1]
        ,[Fld 2]
        ,[Fld 3]
        ,[Fld 4]
        ,[Fld 5]
        ,[Fld 6]
        
      From #temp where [Fld 7] = @ClientDocNo out C:\Test -c -T -S SERVER'
                              
Exec master..xp_cmdshell @CSVexport