Being female, a girl gets ten points (5)
I believe the answer is:
vixen
'being female' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'a girl gets ten points' is the wordplay.
'a girl' becomes 'vi' (short for Violet).
'gets' means one lot of letters go next to another.
'ten' becomes 'X' (Roman numeral).
'points' becomes 'en' (compass points east and north).
'vi'+'x'+'en'='VIXEN'
Can you help me to learn more?
(Other definitions for vixen that I've seen before include "Rudolph's partner" , "Female with a brush" , "Cunning Little creature (Janacek)" , "Mate of 2" , "Female fox - spiteful woman" .)