Odd, abruptly turning up with two fifties for model (4)
I believe the answer is:
doll
This could be a double definition.
'odd abruptly turning up with two fifties for' is the first definition.
The definition suggests a singular noun which matches the answer.
'model' is the second definition.
(a doll is a model of a person)
Can you help me to learn more?
(Other definitions for doll that I've seen before include "Toy baby" , "Play figure" , "Small replica of a person" , "Toy model of person" , "Girl's toy" .)