Put together very badly — like houses (6)
I believe the answer is:
villas
'houses' is the definition.
(villa is a kind of house)
'put together very badly like' is the wordplay.
'put together' means one lot of letters go next to another.
'very' becomes 'v' (abbreviation).
'badly' becomes 'i'll' (eg in ill-advised).
'like' becomes 'as'.
'v' next to 'ill' is 'vill'.
'vill'+'as'='VILLAS'
(Other definitions for villas that I've seen before include "country houses" , "Large houses or holiday homes abroad" .)