Comic loses the head - it's to do with the viewers? (6)

I believe the answer is:

ocular

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'comic' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?

I can't explain the remainder of the clue.

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(Other definitions for ocular that I've seen before include "Eyepiece" , "connected with 23 [SIGHT]" , "Viewer" , "Of the eyes, visual" , "Glaucoma's such" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

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