Uproar about editor making cut (9)
I believe the answer is:
Here is my best explanation:
'cut' is the definition.
'uproar about editor' is the subsidiary indication.
'uproar' becomes 'ruction' (I've seen this before**).
'about' indicates putting letters inside.
'editor' becomes 'ed'.
'ruction' placed around 'ed' is 'reduction'.
'making' is the link.
(Other definitions for reduction that I've seen before include "Introduce (anag) - decrease", "Lessening", "from nine to five, for example", "Drop in price", "cutback!", "cut", "Decrease, diminution", "Introduce by way of discount" and "thickened sauce?".)