The most common and most likely answer to this crossword clue is the 4 letter word GENT
I've seen this crossword clue in The Guardian
G
E
N
T
More clues leading to the result GENT
- Spy bumping off a bloke
- Fellow taking part in daring enterprise
- Man with inside information close to government
- Land bordering northern cove
- Old noble affecting entry without much of entourage
- Fellow presenting information on time
- Charming man, spy needing no introduction
- Guy felt negative about clothes
- Fellow seen as dope given boot ultimately
- Fellow offers some amusing entertainment
Buddy explains!

The straight part
We know that "cove" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cove = gent.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 GENT mean?
GENT noun- A gentleman.
- Noble; well-bred, courteous; graceful.
- Neat; pretty; elegant
- Short for gentamicin.