Behold pressure getting cut (3)
I believe the answer is:
lop
'cut' is the definition.
(lopping is a kind of cutting)
'behold pressure getting' is the wordplay.
'behold' becomes 'lo'.
'pressure' becomes 'p' (abbreviation).
'getting' is a charade indicator (letters next to each other).
'lo'+'p'='LOP'
(Other definitions for lop that I've seen before include "Cut away branches or twigs" , "Cut off, tree branches say" , "Hack" , "Chop (off)" , "Cut (e.g. branch off)" .)