Adele accepting help in the capital (8)
I believe the answer is:
adelaide
'capital' is the definition.
(state capital of South Australia)
'adele accepting help' is the wordplay.
'accepting' is an insertion indicator (inserted letters are accepted).
'help' becomes 'aid' (synonyms).
'adele' placed around 'aid' is 'ADELAIDE'.
'in the' is the link.
(Other definitions for adelaide that I've seen before include "19th century queen" , "Antipodean city" , "Queen < in opera" , "where there was recently a test" , "somewhere in Australia" .)