Cryptic crossword clue
Greatness of soldier opposing shouter on parade ground? 8

The most common and most likely answer to this crossword clue is the 8 letter word GIANTISM

I've seen this crossword clue in Financial Times
G
I
A
N
T
I
S
M

Buddy explains!

The straight part
We know that "Greatness" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case greatness = giantism.
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 GIANTISM mean?

GIANTISM noun
  1. The quality or state of being gigantic; being of abnormally large size.
  2. A condition where there is over-production of growth hormone by the pituitary gland in a child before the bone growth plates close, resulting in excessive long bone growth, accompanied by muscular weakness and sexual impotence.

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