Curly-headed girl with quality! (5)
I believe the answer is:
class
'quality' is the definition.
(class is a kind of quality)
'curly-headed girl' is the wordplay.
'curly-headed' becomes 'c' (this might be a standard abbreviation I've not previously seen).
'girl' becomes 'lass' (lass can informally mean a girl).
'c'+'lass'='CLASS'
'with' is the link.
Can you help me to learn more?
(Other definitions for class that I've seen before include "Teaching group" , "Category; form" , "People having the same social or economic status" , "School group" , "Form; stylishness" .)