Howdy Hellenes,
We probably would have had more solvers if I had not changed the title at the last minute. I thought "It's All Greek to Me" would make things a little too easy, and so I decided to add a little obfuscation by changing it to the equivalent phrase "I Don't Understand That". In retrospect I think I should have gone with the original.
Why would that have made things easier? Well, the four theme entries, in the order indicated, were:
15D) "Another movie with that guy Fiennes in it?!"? [RALPH AGAIN]
16A) Giving addresses, being honest, returning books, e.g.? [ABE TALENTS]
23D) Frankenstein's Monster? [AMALGAM MAN]
55A) Fatty foods, frumpy clothes, etc.? [MODEL TABOO]
Successful solvers found a certain hidden sequence:
rALPH Again
aBE TAlents
amalGAM MAn
moDEL TAboo
...and deduced that the correct answer would be that combination of words in the grid which contained EPSILON, the next letter in the sequence.
The words that do this are "PEPSI LONER", the meta answer.
There was also at least one bonus answer - eagle-eyed solver MC, in addition to providing the correct solution, pointed out that "pET Anew" conceals ETA.
Thanks for solving. Look for next week's puzzle at noon EDT Saturday.