Is this dead? Passion Flower question

It's been in about 3 or 4 years and hasn't had much care other than watering so has grown a bit out of Control, wrapped itself around the fence etc.

It's a passiflora.. Constance Elliott apparently.

Lost its leaves over winter and hasn't started growing them back yet... Some of the branches were dry and dead so have removed them and untangled it alot.

The main body looks 'dry' but isn't brittle / dead.

Then when you get out to the ends of the shoots they're nice and green and 'juicy'

So is it dead? Can it be saved if not?

Was tempted to cut it right back but not sure where it would shoot off from if I did that?

Awful photos below...

With any woody stemmed plant that looks dead, scratch some of the outer bark away with your fingernail, if the fibres inside are green then it's alive, if brown and dry then it's dead. Obviously that only refers to the stem you are testing,

It's also a bit bigger than we'd like... Can I trim it... Quite alot?

Will that help?