Gripped by film, therapist struck by western (6-7)

I believe the answer is:

shrink-wrapped

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'gripped by film' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives can sometimes mean the same thing.

'therapist struck by western' is the wordplay.
'therapist' becomes 'shrink'.
'struck' becomes 'rapped' (rapping is a kind of striking).
'by' says to put letters next to each other.
'western' becomes 'w'.
'rapped' after 'w' is 'wrapped'.
'shrink'+'wrapped'='SHRINK-WRAPPED'

Can you help me to learn more?

(Another definition for shrink-wrapped that I've seen is " Enveloped in plastic".)

I've seen this clue in The Times.

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