Will she work for £50 (4)
I believe the answer is:
doll
'will she' is the definition.
'Doll' can be an answer for 'she'. I'm not sure about the 'will' bit.
'work for ps50' is the wordplay.
'work' becomes 'do work' (synonyms).
'for' means one lot of letters go next to another.
'ps50' becomes 'll' (I can't explain this - if you can you should believe this answer much more).
'do'+'ll'='DOLL'
Can you help me to learn more?
(Other definitions for doll that I've seen before include "Play figure" , "Figurine" , "Toy replica of a person" , "Toy model of person" , "Puppet" .)