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 am not certain of 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 am not sure about this - if you are sure 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" .)