Where sailors can get a drink at the waterside (7)
I believe the answer is:
seaport
'where sailors can' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'a drink at the waterside' is the wordplay.
'a drink' becomes 'sea' ('the drink' can informally mean the sea).
'at' says to put letters next to each other.
'the waterside' becomes 'port' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'sea'+'port'='SEAPORT'
'get' acts as a link.
Can you help me to learn more?
(Other definitions for seaport that I've seen before include "place on the coast" , "Place with harbour for ocean-going ships" , "Esparto (anag)" , "Coastal town with harbour" , "Town with a large harbour" .)