There is a short girl here (7)
I believe the answer is:
theresa
'girl here' is the definition.
(I've seen this before)
'there is a short' is the wordplay.
'is a short' becomes 'sa' (I can't explain this - if you can you should believe this answer much more).
'there'+'sa'='THERESA'
Can you help me to learn more?
(Other definitions for theresa that I've seen before include "Girl's name" , "Lisieux saint" , "Maria -, eighteenth century empress" , "Maria ___ , Archduchess of Austria, d. 1780" , "Maria -, Austr. empress" .)