Crossword Genius

Head abolished uniform during spring (5)

Ross

I believe the answer is:

bonce

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'head' is the definition.
(informal term for a person's head)

I don't understand the remainder of the clue.

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(Other definitions for bonce that I've seen before include "loaf" , "Human head (informal)" , "Head - noodle" , "Nut" , "Nana" .)

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