Head turns up, bungs sweets (11)

I believe the answer is:

headdresses

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'up bungs sweets' is the definition.
Although both the answer and definition are plural nouns, I can't understand how they can define each other.

'head turns' is the wordplay.
'turns' becomes 'dresses' (dressing is a kind of turning).
'head'+'dresses'='HEADDRESSES'

Can you help me to learn more?

(Other definitions for headdresses that I've seen before include "Top Gear items?" , "ceremonial attire" .)

I've seen this clue in The Telegraph.

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