Audibly makes fun of the appearance
I believe the answer is:
guise
'the appearance' is the definition.
(guise is a kind of appearance)
'audibly makes fun of' is the wordplay.
'audibly' shows a homophone (sound like).
'makes fun of' becomes 'guys' (I've seen this before).
'guys' sounds like 'GUISE'.
(Other definitions for guise that I've seen before include "General appearance" , "Appearance, semblance" , "Mask" , "Semblance; likeness" , "Show" .)