Rise weirdly round us in grave (7)
I believe the answer is:
serious
'grave' is the definition.
(I know that grave can be written as serious)
'rise weirdly round us' is the wordplay.
'weirdly' indicates an anagram.
'round' becomes 'o' (o is a circular letter).
'rise' is an anagram of 'seri'.
'seri'+'o'+'us'='SERIOUS'
'in' acts as a link.
(Other definitions for serious that I've seen before include "Earnest - important" , "Stern" , "Not light or frivolous" , "Important - solemn" , "Earnest; vital" .)