Everyone catching salmon in the drink (7)
I believe the answer is:
alcohol
'the drink' is the definition.
(alcohol is a kind of drink)
'everyone catching salmon' is the wordplay.
'everyone' becomes 'all' (I've seen this before).
'catching' indicates putting letters inside.
'salmon' becomes 'coho' (type of salmon).
'all' going around 'coho' is 'ALCOHOL'.
'in' is the link.
(Other definitions for alcohol that I've seen before include "wine, say" , "Intoxicant in wine, etc." , "Intoxicating substance" , "Booze" , "It can make one merry" .)