Crossword Genius

In which to worship head-pieces (7)

Ross

I believe the answer is:

temples

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'pieces' is the definition.
(temple is a kind of piece)

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

Can you help me to learn more?

(Other definitions for temples that I've seen before include "Places of worship" , "Houses of worship" , "Buildings for the workship of gods" , "Buildings for the workshop of gods" , "Cerebral" .)

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