He casts an item of pottery (7)
I believe the answer is:
pitcher
'item of pottery' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'he casts an' is the wordplay.
I cannot really see how this works, but
'he' could be 'itch' and 'itch' is present in the answer.
'an' could be 'per' (synonymous as in 'once an hour', 'once per hour') and 'per' is located in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for pitcher that I've seen before include "large vessel" , "source of drink?" , "Baseball bowler and vessel for liquid" , "crock" , "Baseball player; big jug" .)