The most common and most likely answer to this crossword clue is the 7 letter word ROOSTER
I've seen this crossword clue in The Times
R
O
O
S
T
E
R
More clues leading to the result ROOSTER
- Cock Robin initially waving to Rose
- Work schedule covers old boss of coop?
- List including old bird
- Aussie native behind tailless bird
- Style so retro for male with comb
- Aussie native’s short word for male fowl
- List containing duck and cock
- Fowl list absorbing Oscar initially
- Bird list has to include duck
- Chicken and duck roll sandwiches
Buddy explains!

The straight part
We know that "bird" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bird = rooster.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 ROOSTER mean?
ROOSTER noun- A male domestic chicken (Gallus gallus domesticus) or other gallinaceous bird.
- A bird or bat which roosts or is roosting.
- An informer.
- A violent or disorderly person.
- A powerful, prideful, or pompous person.
- (originally United States slang) A man.
- A wild violet, when used in a children's game based on cockfighting.
- Legislation solely devised to benefit the legislators proposing it.