Bill reduced slightly, Morse's colleague (Geordie) wanting cheapest plonk (5,4)
I believe the answer is:
table wine
'plonk' is the definition.
(I've seen this before)
'bill reduced slightly morse's colleague geordie wanting cheapest' is the wordplay.
I cannot quite understand how this works, but
'bill' could be 'tab' (a tab is a bill at a bar) and 'tab' is found within the answer.
'geordie' could be 'ne' (Geordies are from Tyneside in the North East) and 'ne' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for table wine that I've seen before include "Plonk" , "Drink with meals" , "Drink with meal" .)