The most common and most likely answer to this crossword clue is the 5 letter word MARCH
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More clues leading to the result MARCH
Buddy explains!
The straight part
We know that "demonstration" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case demonstration = march.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 MARCH mean?
MARCH noun- A formal, rhythmic way of walking, used especially by soldiers, bands and in ceremonies.
- A political rally or parade
- Any song in the genre of music written for marching (see Wikipedia's article on this type of music)
- Steady forward movement or progression.
- (euchre) The feat of taking all the tricks of a hand.
- To walk with long, regular strides, as a soldier does.
- To cause someone to walk somewhere.
- To go to war; to make military advances.
- To make steady progress.
- A border region, especially one originally set up to defend a boundary.
- A region at a frontier governed by a marquess.
- Any of various territories with similar meanings or etymologies in their native languages.
- To have common borders or frontiers
- Smallage.