Here's another Cryptic Clue I came up with:
School of thought puts pin in charged oxygen atom (7)
Hope you like it!
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Sign up to join this communityIn my opinion the intended answer here is...
OPINION!
Explanation:
The definition is 'school of thought', and the wordplay requires placing PIN in "O ION" (charged oxygen atom, since oxygen's symbol is 'O' and a charged atom is an 'ION').