Choke is left out (6)
I believe the answer is:
stifle
'choke' is the definition.
(I know that stifle is a type of choke)
'is left out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'is'+'left'='isleft'
'isleft' is an anagram of 'STIFLE'.
(Other definitions for stifle that I've seen before include "Part of animal's leg" , "Asphyxiate - itself (anag)" , "Joint in hind leg of horse" , "Gag" , "Silence" .)