W A ___, English clergyman renowned for transposition of the initial consonants or consonant clusters of a pair of words (7)

(Other definitions for spooner that I've seen before include "English clergyman and Oxford don (1844-1930), who had an "ism" named after him" , "One who gave his name to a transposition of sounds in speech" , "Revd W.A.- was famed for his errors in speech" , "Original transposer of initial letters in speech" , "Initial-transposing clergyman" .)