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' anagrammed gives 'OUTSIDE'.
'but' acts as a 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" .)