Boys back-to-back in the doghouse (6)
I believe the answer is:
kennel
'doghouse' is the definition.
('kennel' can be a synonym of 'doghouse')
I can't explain the rest of the clue.
(Other definitions for kennel that I've seen before include "boxer's corner?" , "A dog's home, usually outside house" , "Home for the dog" , "Canine home" , "housing for boxer, say" .)