Where thin gun possibly is produced? (7-6)

I believe the answer is:

hunting ground

I'm a little stuck... Click here to teach me more about this clue!

'where' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.

'thin gun possibly is produced?' is the wordplay.
'possibly' is an anagram indicator.
'is produced?' becomes 'ground' (I am not sure about this - if you are sure you should believe this answer much more).
'thin'+'gun'='thingun'
'thingun' with letters rearranged gives 'hunting'.
'hunting'+'ground'='HUNTING-GROUND'

Can you help me to learn more?

(Other definitions for hunting ground that I've seen before include "where pursuers operate" , "Area" .)

I've seen this clue in The Telegraph.

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