Wizard close to Harry in craft (7)
I believe the answer is:
pottery
'craft' is the definition.
(type of craft)
'wizard close to harry' is the wordplay.
'wizard' becomes 'potter' (Harry Potter).
'close to' suggests the final letters (the close/ending of).
The last letter of 'harry' is 'y'.
'potter'+'y'='POTTERY'
'in' is the link.
(Other definitions for pottery that I've seen before include "China, for example" , "Ceramic ware" , "Items made from clay" , "Earthenware" , "Ceramics factory" .)