Second leg: in the dressing rooms? (9)
I believe the answer is:
backstage
'the dressing rooms?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'second leg' is the wordplay.
'second' becomes 'back' (to second a motion is to back it).
'leg' becomes 'stage' (synonyms).
'back'+'stage'='BACKSTAGE'
'in' is the link.
Can you help me to learn more?
(Other definitions for backstage that I've seen before include "dressing room area" , "away from public view" , "Behind the scenes (theatrically)" , "Wings etc" , "out of the limelight" .)