Grave issue, or resolved? (7)
I believe the answer is:
serious
'grave' is the definition.
(I know that grave can be written as serious)
'issue or resolved?' is the wordplay.
'resolved?' is an anagram indicator.
'issue'+'or'='issueor'
'issueor' with letters rearranged gives 'SERIOUS'.
(Other definitions for serious that I've seen before include "Important -- grave" , "Earnest - important" , "Solemn, thoughtful" , "Important - solemn" , "Not light or frivolous" .)