Workshop: small one in house reduced (6)
I believe the answer is:
studio
'workshop' is the definition.
(I know that workshop can be written as studio)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for studio that I've seen before include "Artist's workshop" , "Building for movie-making" , "Artist's place of work" , "Place for the practice of an art" , "Room to make radio or television programme" .)