Cut back (6)
'cut back' is the definition.
(synonyms)
This is all the clue.
(Other definitions for reduce that I've seen before include "Make smaller or less" , "Cut down on, lessen" , "Pare" , "Of a sauce, thicken" , "Concentrate" .)
(Other definitions for reduced that I've seen before include "Made smaller" , "Discounted" , "Curtailed" , "Abridged" , "looked smaller" .)