How a drink ruined production (9)
I believe the answer is:
handiwork
'production' is the definition.
(handiwork is a kind of production)
'how a drink ruined' is the wordplay.
'ruined' indicates anagramming the letters.
'how'+'a'+'drink'='howadrink'
'howadrink' with letters rearranged gives 'HANDIWORK'.
(Other definitions for handiwork that I've seen before include "Manual creation" , "one's doing" .)