Talk about being embraced by ox (4)
I believe the answer is:
yack
'talk' is the definition.
(yacking is a kind of talking)
'about being embraced by ox' is the wordplay.
'about' becomes 'c' (circa abbreviation).
'being embraced by' indicates putting letters inside.
'ox' becomes 'yak' (yak is a kind of ox).
'c' going into 'yak' is 'YACK'.
(Other definitions for yack that I've seen before include "Prattle" , "Talk incessantly" , "Natter" .)