City girl showing form (5)
I believe the answer is:
class
'form' is the definition.
(I know that form can be written as class)
'city girl' is the wordplay.
'city' 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'
'showing' is the link.
Can you help me to learn more?
(Other definitions for class that I've seen before include "Kind" , "Fine" , "Group - style" , "Genus" , "Excellent" .)