once in awhile 'Now and Then' is a good one.
Transposing letters in a word or phrase is called metathesis.
Strike your fancy
Actor trifles illusion.
UFO is not a word. It is a TLA (three-letter-acronym) for the three-word-phrase "Unidentified Flying Object".
Game, Set, Match.
descent with modification
Interrupt her occasionally by shouting a random word or phrase and apologizing for your Tourettes.
Yes, "beneath" is a preposition that can be part of a prepositional phrase. For example, in the phrase "The book is beneath the table," "beneath the table" is a prepositional phrase.
ars gratia artis
I'll be back
It's a three-word phrase with no semantic content
Make it happen