Bar he built that Winehouse avoided? (5)
I believe the answer is:
rehab
'winehouse avoided?' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'bar he built' is the wordplay.
'built' is an anagram indicator.
'bar'+'he'='barhe'
'barhe' with letters rearranged gives 'REHAB'.
'that' is the link.
Can you help me to learn more?
(Other definitions for rehab that I've seen before include "brief convalescence?" , "Training and therapy after drug abuse" , "Treatment for, eg, addiction" , "Course of treatment for addicts" , "Process of restoring, eg, an addict to health" .)