CPR pros (3)

I think it could be either:

Which length description are you looking for?:

ems

'cpr pros' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for ems that I've seen before include "Printer's units, each two ens" , "German river" , "Units used in printing" , "German town" , "Units of print measure" .)

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.