Refuse maybe to buy son house — no time (7)
I believe the answer is:
boycott
'refuse maybe to buy' is the definition.
'son house no time' is the wordplay.
'son' becomes 'boy' (synonyms).
'house' becomes 'cot'.
'no time' becomes 't' (abbreviation. I am not sure about the 'no' bit.).
'boy'+'cot'+'t'='BOYCOTT'
Can you help me to learn more?
(Other definitions for boycott that I've seen before include "Refuse to handle or deal with" , "Refuse to deal with - Yorkshire and England batsman" , "ex-Yorkshire cricket captain" , "Trade embargo" , "Refuse to trade with" .)