Bogey we hear eatin’ disgustingly by top of cooker (9)
I believe the answer is:
hobgoblin
'bogey' is the definition.
(I've seen this before)
'we hear eatin' disgustingly by top of cooker' is the wordplay.
'we hear' indicates a 'sounds like' (homophone) clue.
'eatin' disgustingly' becomes 'gobblin' (gobbling without the n).
'by' is a charade indicator (letters next to each other).
'top of cooker' becomes 'hob' (I've seen this before).
'gobblin' sounds like 'goblin'.
'goblin' put after 'hob' is 'HOBGOBLIN'.
(Other definitions for hobgoblin that I've seen before include "Ugly elf" , "A mischievous or evil spirit" , "frightful spirit" , "Mischievous 17 across" , "Fairytale character" .)