The most common and most likely answer to this crossword clue is the 9 letter word OUTRIGGER
I've seen this crossword clue in The Times
O
U
T
R
I
G
G
E
R
More clues leading to the result OUTRIGGER
- Blooming ordeal reportedly, projecting beam
- Heading away, the solver set off in boat
- Boat from Oxford University set off
- Boat tour without limits set off
- This gig – tourer – rebuilt with extension for additional horse
- Beginners from Oxford University set off in boat
- Where Parisian set off in boat
- Dark Blues set off in racing boat
- Banned oilman’s craft?
- Dark Blues briefly set off in racing boat
Buddy explains!

The straight part
We know that "projecting beam" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case projecting beam = outrigger.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 OUTRIGGER mean?
OUTRIGGER noun- Any of various projecting beams or spars that provide support for a sailing ship's mast.
- A long thin timber, pontoon, or other float attached parallel to a canoe or boat by projecting struts as a means of preventing tipping or capsizing.
- An outrigger canoe or boat.
- An iron bracket or brace for an oarlock projecting from the side of a rowing boat.
- An extension mechanism, often retractable when not in use, on a boat, vehicle, or structure which helps to stabilize it to keep it from tipping over.
- A type of ski pole, with skis attached at the bottom, instead of the spike/pick found on a normal pole. It is used in downhill skiing variants of para-skiing, especially those that use a sit-ski, such as the monoski.