Coach went right to the house (5,4)
I believe the answer is:
stage left
'right to the house' is the definition.
(I've seen this before)
'coach went' is the wordplay.
'coach' becomes 'stage' (stagecoach).
'went' becomes 'left' (as in leaving).
'stage'+'left'='STAGE LEFT'
(Other definitions for stage left that I've seen before include "actors direction" , "right to the house" , "on the prompt side" , "Coach once departed" , "One side of a theatre" .)