Break seal on drinks (4)
I believe the answer is:
'drinks' is the definition.
(ale is a kind of drink)
'break seal' is the wordplay.
'break' indicates anagramming the letters.
'seal' with letters rearranged gives 'ALES'.
'on' is the link.
(Other definitions for ales that I've seen before include "Types of beer" , "A sale of beers" , "What might be delivered by pumps" , "Alcoholic drinks" .)