Crossword Genius

Footnote I add to a letter from Greece (3)

Ross

I believe the answer is:

psi

I'm a little stuck... Click here to teach me more about this clue!

'letter from greece' is the definition.
(letter from the Greek alphabet)

'footnote i add' is the wordplay.
I cannot really understand how this works, but
'footnote' could be 'ps' and 'ps' is found in the answer.
'i' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...

'to a' acts as a link.

Can you help me to learn more?

(Other definitions for psi that I've seen before include "Greek letter; pounds per square inch (abbrev.)" , "letter from abroad" , "Twenty-third letter of Greek alphabet" , "Pounds per sq. in. (abbr.)" , "one employed by Socrates?" .)

I've seen this clue in The Globe and Mail.
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.