I'm a leader of Muslims (4)

I believe the answer is:

imam

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'leader of muslims' is the definition.
'imam' can be an answer for 'leader' (imam is a kind of leader). I am not certain of the 'of muslims' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for imam that I've seen before include "Ma, I'm off to find religious Muslim" , "Strict religious leader" , "Mosque's prayer leader" , "Person leading devotions in a mosque" , "Prayer-leader in a mosque" .)

I've seen this clue in The Globe and Mail and The Times.

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