On the way to getting drunk, leaves stick here (8)
I believe the answer is:
strainer
'leaves stick here' is the definition.
(as in a tea strainer)
'on the way to getting drunk' is the wordplay.
'on' is a charade indicator (letters next to each other).
'the way' becomes 'st' (abbreviation for street).
'to getting drunk' becomes 'rainer' (I can't justify this - if you can you should give a lot more credence to this answer).
'st' next to 'rainer' is 'STRAINER'.
Can you help me to learn more?
(Other definitions for strainer that I've seen before include "Tea leaf catcher" , "eg Colander" , "to keep out foreign bodies" , "one that stretches?" , "Person making too much effort" .)