House official punches Baptist up (6)
I believe the answer is:
prefab
'house' is the definition.
(I have seen 'Temporary house ' mean 'prefab' so perhaps 'house' could also mean 'prefab')
'official punches baptist up' is the wordplay.
'official' becomes 'ref' (match official in football, say).
'punches' means one lot of letters goes inside another (some letters punch a hole in others).
'baptist up' becomes 'pab' (I am not sure about this - if you are sure you should believe this answer much more).
'ref' placed into 'pab' is 'PREFAB'.
Can you help me to learn more?
(Other definitions for prefab that I've seen before include "Ready-made house" , "Building assembled from prepared parts" , "Building easy to assemble" , "Simple house" , "Building constructed in advance of its erection" .)