Sibling twisted, but gets a washing machine (4,3)
I believe the answer is:
twin tub
'a washing machine' is the definition.
(I've seen this before)
'sibling twisted but' is the wordplay.
'sibling' becomes 'twin' (twin is a kind of sibling).
'twisted' says the letters should be written in reverse.
'but' written backwards gives 'tub'.
'twin'+'tub'='TWIN-TUB'
'gets' is the link.
(Other definitions for twin tub that I've seen before include "Cleaner" , "With extra drum" , "Washing machine" .)