Still can't make out that last line. Here's another version.

A German clock winder to Dublin once came
Benjamin Fooks was the ould German's name
And as he was winding his way round the Strand
He played on his flute and the music was grand

Oh there was a young lady from Grosvenor Square
Who said that her clock was in need of repair
In walks the bold German, and to her delight
In less than five minutes he had her clock right

Now as they were seated down on the floor
There came this very loud knock on the door
In walks her husband and great was his shock
For to see the ould German wind up his wife's clock

The husband says he "Now look Mary-Ann
Don't let that bold German come in here again
He wound up your clock and left mine on the shelf
If your ould clock needs winding, sure I'll wind it meself

I know of a guy from Dublin called Helmut Fuchs. I wonder if his ancestors had anything to do with this song!

Regards Mick Bracken