Nude lovers jumping up in the air (10)
I believe the answer is:
unresolved
'up in the air' is the definition.
(I've seen this before)
'nude lovers jumping' is the wordplay.
'jumping' indicates an anagram.
'nude'+'lovers'='nudelovers'
'nudelovers' anagrammed gives 'UNRESOLVED'.
(Other definitions for unresolved that I've seen before include "up in the air" , "Not finally settled" , "(to be continued)" .)