Is it on the boozy side? (4)
I believe the answer is:
port
'side?' is the definition.
(I know that port is a type of side)
'is it on the boozy' is the wordplay.
'is it' becomes 't' (abbreviation. e.g. in 'tis).
'on' is a charade indicator (letters next to each other).
'the boozy' becomes 'por' (I can't justify this - if you can you should give a lot more credence to this answer).
't' after 'por' is 'PORT'.
Can you help me to learn more?
(Other definitions for port that I've seen before include "Grimsby, perhaps" , "Drink - left at sea" , "Sweet dark red fortified wine taken after meal" , "Sweet red wine for after dinner" , "where one would expect water" .)