Item on Fox trashing Republican president (4)
I believe the answer is:
bush
'president' is the definition.
(two US presidents have been called Bush)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for bush that I've seen before include "Shrub; Kate --, singer" , "ex-president" , "metal sleeve used in drilling" , "part of shrubbery" , "George or George W." .)