He invested in a Norfolk town's crockery (6)
I believe the answer is:
dishes
'crockery' is the definition.
Although both the answer and definition are nouns, they are not in the same form of the noun.
'he invested in a norfolk town's' is the wordplay.
'invested in' indicates putting letters inside.
'a norfolk town' becomes 'Diss' (Diss is a town in Norfolk).
'he' placed within 'diss' is 'DISHES'.
Can you help me to learn more?
(Other definitions for dishes that I've seen before include "Containers for food" , "beauties" , "Bowls" , "Serving plates" , "Crockery and its contents" .)