Glasses of wine knocked back in bad temper (5)
I believe the answer is:
strop
'bad temper' is the definition.
(strop can mean a temper tantrum)
'glasses of wine knocked back' is the wordplay.
'glasses of' becomes 's' (I am not sure about this - if you are sure you should believe this answer much more).
'wine' becomes 'port' (port wine is a kind of wine).
'knocked back' shows that the letters should be reversed in order.
'port' reversed gives 'trop'.
's'+'trop'='STROP'
'in' is the link.
Can you help me to learn more?
(Other definitions for strop that I've seen before include "Fit of bad temper" , "Razor sharpener" , "Razor-sharpener" , "Piece of leather on which razor is sharpened" , "Paddy" .)