Crossword Genius

Underground press's morning reporting is some facts short (8)

Ross

I believe the answer is:

samizdat

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

'underground' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?

'press's morning reporting is some facts short' is the wordplay.
I cannot really see how this works, but
'morning' could be 'am' (as in 12:00 AM) and 'am' is present in the answer.
'some' could be 'a' and 'a' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for samizdat that I've seen before include "Distribution of illegal documents (in Soviet Union)" , "Circulation of underground literature in Soviet Union" , "System of clandestine printing and distribution in the former Soviet Union" , "Russian's clandestine printing" , "Illegal printing press" .)

I've seen this clue in The Guardian.
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