Wide country girl (5)
I believe the answer is:
woman
'girl' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'wide country' is the wordplay.
'wide' becomes 'w' (abbreviation e.g. in cricket).
'country' becomes 'oman' (Oman is an example).
'w'+'oman'='WOMAN'
Can you help me to learn more?
(Other definitions for woman that I've seen before include "With 1a [OLD], one's rather timid" , "person not going on stag-night" , "With 1a [NEW] a freedom fighter" , "Adult female" , "See 16" .)