The Guardian installing fine new kind of PC? (4)
I believe the answer is:
woke
'new kind of pc?' is the definition.
(PC stands for politically correct)
'the guardian installing fine' is the wordplay.
'the guardian' becomes 'we' (the crossword setter and their Guardian colleagues).
'installing' indicates putting letters inside (inserted letters are installed).
'fine' becomes 'OK' (synonyms).
'we' going around 'ok' is 'WOKE'.
(Other definitions for woke that I've seen before include "Came to" , "Stopped sleeping" , "Ceased to sleep" , "Roused from sleep" .)