It looks like Clarke may have been drawing in her notebook.
She looks peaceful as light rain awakens her from her meditation/nap.
Ok, so bear with me because I have a theory that's probably way way out there, but here goes.
This may be a temporary post.
So while digging through the rubble covering the bunker, Clarke found The Flame. Since The Grounders ended their belief system of The Flame, Gaia left it outside of the bunker, Btw- Gaia is in the bunker. Clarke has it and may have possibly ascended. I say this because Becca ascended on her own & like Becca, Clarke made herself a Nightblood. There are quite a few parallels with these two characters.
Maybe Clarke was meditating and speaking with the spirits of The Commanders.
Remember how peaceful Lexa was in 3x07 when she was meditating? Clarke said ~ Someone tried to kill you today. How are you this calm?
Anyway, this show is all about parallels & we know the writers never forget ..... and Lexa did promise ~ I'll always be with you.
No clue whether Clarke ascended or not, but it would be nice if she had #TheFlame. Clarke has protected the Flame; The Flame has protected her & her friends, now she may need to protect the Flame again from this new army of 'hostile' Nightbloods.