Crossword Genius

Pierced enclosure, treated differently (10)

Ross

I believe the answer is:

penetrated

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'pierced' is the definition.
The answer and definition can be both to do with contact as well as being past participle verbs.
Maybe there's an association between them I don't understand?

'enclosure treated differently' is the wordplay.
'enclosure' becomes 'pen' (pen is a kind of enclosure).
'differently' indicates anagramming the letters.
'treated' anagrammed gives 'etrated'.
'pen'+'etrated'='PENETRATED'

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I've seen this clue in The Daily Express.
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