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' is a charade indicator (letters next to each other).
'ps50' becomes 'll' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'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" .)