Wild cat biting a reindeer's head and part of throat (6)
I believe the answer is:
larynx
'part of throat' is the definition.
(I know that larynx is part of pharynx)
'wild cat biting a reindeer's head' is the wordplay.
'wild cat' becomes 'lynx' (I've seen this before).
'biting' is an insertion indicator (some letters bite or swallow others).
'head' indicates taking the first letters.
The first letter of 'reindeer' is 'r'.
'a'+'r'='ar'
'lynx' placed around 'ar' is 'LARYNX'.
'and' is the link.
(Other definitions for larynx that I've seen before include "Organ containing the vocal cords" , "Location of vocal cords" , "it's essential to speak!" , "Creator of speech" , "box of cords?" .)