His manlier truth disrupted and reformed religious practice (6,6)

I believe the answer is:

martin luther

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'his' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'manlier truth disrupted and reformed religious practice' is the wordplay.
'manlier truth' can be anagrammed to 'MARTIN LUTHER'.
Though, I am not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for martin luther that I've seen before include "German Protestant theologian, d. 1546" , "He reformed" .)

I've seen this clue in The Irish Times.

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