I feel like I should know how to do this -- how od I retrieve the current headline as an org-element object?

context: I want to take a headline like this

** Jane Doe
- demonstrates an understanding of research topic :: yes
- Annotated Bibliography :: very nicely done
- Grammar and Spelling :: no major problems, but see inline comments
- Further Comments :: see file
- Grade :: A

And set the headline's "GRADE" property to the value of the "- Grade ::" line. But, I want to make sure that I'm still in the current headline when I set the property (rather than accidentally navigating to the next headline, because the current headline doesn't contain a "- Grade ::" lin).

Tanks as always for the help! I'm pretty sure I've asked this question before but can't find the answer...