In the evening, drop of plonk (3)
I believe the answer is:
set
'drop of plonk' is the definition.
'set' can be an answer for 'drop' (thesaurus). I am unsure of the 'of plonk' bit.
'in the evening' is the wordplay.
I cannot really understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
The remaining letters 'se' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for set that I've seen before include "Gel; group" , "carriage" , "Customary < scenery < a TV < series" , "several games" , "Hard; place" .)