10 across
Hard
to
see
more
than
3,
10
high
(9)
Hard to see more than 3, 10 high (9)
hints
0
checks
0
hints
The whole clue is the definition (& lit or double definition).
How the clue works
The definition is Hard to see — think of those blurry, blocky images. "More than 3" gives you PI (that famous number just over 3), "10" gives you X (Roman numerals), and "high" gives you ELATED, and you just string them all together.