My career working in the dairy business (8)
I believe the answer is:
creamery
'the dairy business' is the definition.
(I've seen this before)
'my career working' is the wordplay.
'working' indicates an anagram.
'my'+'career'='mycareer'
'mycareer' is an anagram of 'CREAMERY'.
'in' is the link.
(Other definitions for creamery that I've seen before include "Where dairy products are produced" , "Where dairy products are made" , "dairy business" .)