Frantic person doing marketing? (5)

I believe the answer is:

hyper

'frantic' is the definition.

I don't understand the remainder of the clue.

(Other definitions for hyper that I've seen before include "Unable to sit still" , "Slang adjective for over-active or highly-strung" , "Prefix meaning excessively, perhaps active" , "Overexcited" , "Over-stimulated" .)

I've seen this clue in The Times.

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