Tedious dances — but not indoors (7)
I believe the answer is:
outside
'not indoors' is the definition.
('outside' is the opposite to 'indoors')
'tedious dances' is the wordplay.
'dances' indicates an anagram.
'tedious' with letters rearranged gives 'OUTSIDE'.
'but' is the link.
(Other definitions for outside that I've seen before include "In the fresh air?" , "having emerged from the tunnel?" , "Not indoors" , "Where smokers now often must go" , "Alfresco" .)