Revolutionary socialist cause in As You Like It? (2,5)
I believe the answer is:
to order
'as you like it?' is the definition.
(I've seen this in another clue)
'revolutionary socialist cause' is the wordplay.
'revolutionary' says the letters should be written in reverse.
'socialist' becomes 'red' (socialism is often associated with the colour red).
'cause' becomes 'root' (as in a root cause).
'red'+'root'='redroot'
'redroot' written backwards gives 'TO ORDER'.
'in' is the link.
(Other definitions for to order that I've seen before include "In accordance with specification" , "In fulfilment of an instruction" , "As specified" , "as required" .)