Feline swallows a red organ found in the neck (6)
I believe the answer is:
larynx
'organ found in the neck' is the definition.
I can't judge whether this defines the answer.
'feline swallows a red' is the wordplay.
'feline' becomes 'lynx' (lynx is a kind of feline).
'swallows' is an insertion indicator.
'red' becomes 'r' (I've seen this in other clues).
'a'+'r'='ar'
'lynx' going around 'ar' is 'LARYNX'.
Can you help me to learn more?
(Other definitions for larynx that I've seen before include "Site of the vocal cords" , "Where growls come from" , "Cavity containing vocal chords" , "Location of vocal cords" , "Creator of speech" .)