Crossword Genius

Church leader carrying zero in medical coverage (4)

Ross

I believe the answer is:

pope

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

This clue might be a double definition.

'church leader' is the first definition.
(I've seen this before)

'zero in medical coverage' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'carrying' acts as a link.

Can you help me to learn more?

(Other definitions for pope that I've seen before include "served in the Vatican" , "author" , "English poet, d. 1744" , "Vatican head" , "Head of RC church" .)

I've seen this clue in The Irish Times.
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