This kitchen device is larger, I hear (6)
I believe the answer is:
grater
'this kitchen device' is the definition.
(I've seen this in another clue)
'larger i hear' is the wordplay.
'larger' becomes 'greater' ('great' can be similar in meaning to 'large').
'i hear' indicates a 'sounds like' (homophone) clue.
'greater' is a homophone of 'GRATER'.
'is' is the link.
(Other definitions for grater that I've seen before include "It makes small bits of food" , "Kitchen device" , "kitchen equipment" , "kitchen instrument" , "Utensil for reducing to small particles" .)