The most common and most likely answer to this crossword clue is the 7 letter word GALLANT
I've seen this crossword clue in The Guardian
G
A
L
L
A
N
T
More clues leading to the result GALLANT
- Chivalrous Liberal worker supporting young woman
- Romeo’s lass cut top off plant
- Brave man to vex six-footer
- Chivalrous worker faced with irritation
- Trouble with soldier, perhaps, brave
- Daring US girl inclined to ignore English
- Good books contain everything top-class and noble
- Brave face social worker put on
- Cavalier ill-will shown over worker
- Dashing fellow who went to the top at sea
Buddy explains!

The straight part
We know that "Dashing fellow" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dashing fellow = gallant.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 GALLANT mean?
GALLANT adjective- Brave, valiant.
- Honorable.
- Grand, noble.
- Showy; splendid; magnificent; gay; well-dressed.
- A fashionable young man who is polite and attentive to women.
- One who woos, a lover, a suitor, a seducer.
- Topgallant
- To attend or wait on (a lady).
- To handle with grace or in a modish manner.
- Polite and attentive to ladies; courteous to women; chivalrous.