Girl takes new road round capital of Hawaii (5)
I believe the answer is:
rhoda
'girl' is the definition.
'new road round capital of hawaii' is the wordplay.
'new' indicates an anagram.
'round' indicates putting letters inside.
'capital of' indicates taking the first letters.
The initial letter of 'hawaii' is 'h'.
'road' anagrammed gives 'roda'.
'roda' enclosing 'h' is 'RHODA'.
'takes' acts as a link.
(Other definitions for rhoda that I've seen before include "Fem. name; hoard (anag.)" , "Woman" , "Girl's name; hoard (anag.)" , "Girl" .)