Quietly epic outline of tech head's ulcer (6)

I believe the answer is:

peptic

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'ulcer' is the definition.
(peptic ulcer is a kind of ulcer)

I don't understand how the rest of the clue works.

(Other definitions for peptic that I've seen before include "This ulcer is in the stomach or duodenum" , "of the digestive system" , "Kind of ulcer in stomech or duodenum" , "Of digestion, and a related ulcer" , "Relating to digestion - kind of ulcer" .)

I've seen this clue in the Sydney Morning Herald.

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