Knock over drinks in fit of temper (5)
I believe the answer is:
strop
'fit of temper' is the definition.
'knock over drinks' is the wordplay.
'knock over' says the letters should be written in reverse.
'drinks' becomes 'ports' (port is a kind of drink).
'ports' backwards is 'STROP'.
'in' acts as a link.
(Other definitions for strop that I've seen before include "Piece of leather on which razor is sharpened" , "rage" , "Prime cutthroat" , "Paddy" , "Bad mood; sharpen" .)