GI's head treated by Spooner in surgery (4,3)

I believe the answer is:

nose job

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'surgery' is the definition.
(nose job is a kind of surgery)

I don't understand the rest of the clue.

(Other definitions for nose job that I've seen before include "Unfortunately" , "Rhinoplasty" , "Facial operation" , "work for boat race" , "Surgery of the face" .)

I've seen this clue in The Independent.

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