Advice on sunglare

[Pipsmom]

I've worked on this picture all day and nothing is working for me 100% so I'm back asking my teachers here.
Tried a gradient with limited success, isolation and saturation, cloning, hue, levels, curves.....you name it I've tried it.
Problem is the bright sunglare/fade on the top of the head in the upper left on the hair ....there's no pixel imfo to retrieve in a small area there and if I go to far the green and blue really destroy what I'm attempting. Can you point me in the right direction correcting this fade out of color or lack of?
This lady seems to love being in the wrong spot to take selfies ......as I have three with varying degrees of fade/sun glare, all correctable except this one. What's your option to try next?

 

[colleague]

I normally take a copy of the layer with mode 'multiply' and mask the part that I want darkened
sometimes you have to repeat that a few time
and a layer on top with mode 'color' to finish

here is psd https://www.dropbox.com/s/xxh6ugex49kxdgj/multiply.psd?dl=0

 

[Pipsmom]

Many, many thanks Will give that a lot of practice since she makes this a habit.