The most common and most likely answer to this crossword clue is the 9 letter word TRICOLOUR
I've seen this crossword clue in The Daily Telegraph
T
R
I
C
O
L
O
U
R
More clues leading to the result TRICOLOUR
- Standard to recall Irish officer during trip
- Flag officer goes by state during round of duty
- During trip, Rhode Island pass makes one flag
- 1A featuring small flower, some might say
- Standard loom attached to knitted fabric, briefly
- Pass beyond outskirts of Rimini during trip, one flying over Italian embassy, perhaps?
- Guardian’s oddly turgid column put forward as standard
- One that’s flown over the Channel
- Standard raised across the Channel?
- Go red after short excursion and flag
Buddy explains!

The straight part
We know that "Standard raised across the Channel?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case standard raised across the channel? = tricolour.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 TRICOLOUR mean?
TRICOLOUR noun- A flag consisting of three stripes that are either vertical or horizontal; all of equal size, and of a different colour each.
- Having three colours.