"Blushing crow" for "crushing blow."

• Hated the book, perhaps
• Lack of pies, say
• Comical transposition
• "Hoobert Heever," e.g.
• Trump the jack, e.g.
• Like this good clue, it might have you stuck!
• Burly chassis for Shirley Bassey, say?
• Transposition of initial consonants in a pair of words

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1900, but according to OED in use at Oxford as early as 1885, involuntary transposition of sounds in two or more words (such as "shoving leopard" for "loving shepherd," "half-warmed fish" for "half-formed wish," "beery work speaking to empty wenches," etc.), ...

WordNet Word definitions in WordNet
n. transposition of initial consonants in a pair of words