The most common and most likely answer to this crossword clue is the 9 letter word MINUTEMAN
I've seen this crossword clue in The Guardian
M
I
N
U
T
E
M
A
N
More clues leading to the result MINUTEMAN
- Old US soldier sees little point apprehending old woman
- ICBM takes sixty seconds reaching island
- The little guy’s defence system
- Pygmy militia member?
- Little old lady close to Russian revolutionary
- Homunculus’s missile?
- Very small isle’s missile
- Tiny isle’s ballistic missile
- ‘Little Boy’? No, a smaller, older explosive device
- . Little article about male revolutionary
Buddy explains!

The straight part
We know that "revolutionary" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case revolutionary = minuteman.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 MINUTEMAN mean?
MINUTEMAN noun- During the American War for Independence, a citizen-soldier who would fight for the Patriots at a minute's notice.
- A man who reaches orgasm undesirably quickly during sexual intercourse.
- The cyclist starting one minute ahead of, or behind, another rider in a time trial.