Crossword Genius

Worshipping spies? (6,7)

Ross

I believe the answer is:

secret service

I'm a little stuck... Click here to teach me more about this clue!

'spies?' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for secret service that I've seen before include "Spying agency" , "Government department involved in espionage" , "Government agency" , "Spies' department" , "Hush-hush organisation" .)

I've seen this clue in The Irish Independent.
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