Can someone here please tell me what a curly pow is?

It is mentioned in the chorus of the song Dainty Davy

So, lease/leeze me on your curly pow
Dainty Davy, Dainty Davy,
Oh, lease/leeze me on your curly pow,
You are my Dainty Davy.

All I could find in all the dictionaries known to me is
POW - prisoner of war
which I can't believe to be the meaning here.

And while we are at it - is it lease or leeze?
I have seen both words in different prints, I can't find leeze in any dictionary, and for lease I only found a meaning similar to "rent". So what is it supposed to mean?

And another one from the song's first verse:

In yonder town there lived a maid
Ah, she was the keeper of her trade
She fell in love with a light ragade
And his name was Dainty Davy

What's a ragade???

I have all these words printed out, so it cannot be a mishearing by me - but I would not exclude typos.

Thanks in advance
cu,
Andreas