Good morning to you all,
My immediate reaction when I saw this clue was that it was a verb and MIME sprang to mind.
We all agree that the 'Ms' represent thousands; the letters 'I' [iota] and 'E' [epsilon] are both Greek characters. Where this argument falls down is the position of the apostrophe which is before the 's' and not after it!
Your input would be appreciated.
Regards,
Caravaggio