Portion of chicken, you know (3)
I believe the answer is:
ken
'know' is the definition.
(thesaurus)
'portion of chicken you' is the wordplay.
'portion of' says the answer is hidden in the clue.
'KEN' is hidden in the letters of 'chicken you'.
(Other definitions for ken that I've seen before include "Know; man's name" , "Notice" , "Understanding - boy's name" , "One's range of knowledge" , "Awareness" .)