The most common and most likely answer to this crossword clue is the 7 letter word NUMERIC
I've seen this crossword clue in The Guardian
N
U
M
E
R
I
C
More clues leading to the result NUMERIC
Buddy explains!

The straight part
We know that "regarding 1984?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case regarding 1984? = numeric.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does NUMERIC mean?
NUMERIC noun- Any number, proper or improper fraction, or incommensurable ratio.
- Of or relating to numbers, especially the characters 0 to 9.
- Of or pertaining to numbers
- The same in number; hence, identically the same; identical.