Turns up, front entrance opens into lounge with piano - it's a temporary setting (6)
I believe the answer is:
prefab
'a temporary setting' is the definition.
'turns up front entrance opens into lounge with piano' is the wordplay.
'turns up' says the letters should be written in reverse.
'opens' suggests taking the first letters.
'into' means one lot of letters goes inside another.
'lounge with' becomes 'bar' (I am not sure about the 'with' bit.**).
'piano' becomes 'p'.
The first letters of 'front entrance' is 'fe'.
'bar'+'p'='barp'
'fe' inserted within 'barp' is 'baferp'.
'baferp' reversed gives 'PREFAB'.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for prefab that I've seen before include "Easily built dwelling" , "Temporary house" , "Building assembled with sections made elsewhere" , "Ready-made building" , "Temporary building" .)