Simply help Conservatives work for children (4,2,7)
I believe the answer is:
just so stories
'work for children' is the definition.
'just so stories' can be an answer for 'work' (I have seen 'work of fiction' mean 'just so stories' so perhaps 'work' could also mean 'just so stories'). I am not sure about the 'for children' bit.
'simply help conservatives' is the wordplay.
'simply' becomes 'just' (synonyms).
'help' becomes 'SOS' (emergency abbreviation SOS).
'conservatives' becomes 'tories' (Tory is an example).
'just'+'sos'+'tories'='JUST SO STORIES'
Can you help me to learn more?
(Other definitions for just so stories that I've seen before include "Work for kids" , "Kipling's children's classic" , "work of fiction" , "book for children" , "Accounts for children" .)