Appertain (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
belong
'appertain' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for belong that I've seen before include "feel like one of the family" , "'Be part of, fit in (6)'" , "find a place?" , "Be correctly assigned" , "Appertain" .)