Pull no ox about (4)
I believe the answer is:
yank
'pull' is the definition.
(I know that yank is a type of pull)
'no ox about' is the wordplay.
'no' becomes 'n' (common abbreviation y/n).
'ox' becomes 'yak' (yak is a kind of ox).
'about' is an insertion indicator.
'n' put into 'yak' is 'YANK'.
(Other definitions for yank that I've seen before include "Countryman" , "Pull roughly" , "Sharp tug" , "Jerk, pull suddenly" , "Unceremoniously drag" .)