The most common and most likely answer to this crossword clue is the 6 letter word THRUSH
I've seen this crossword clue in Financial Times
T
H
R
U
S
H
More clues leading to the result THRUSH
- Bird so hard to draw in river
- Songbird cut half of this fly
- Songbird's quiet after American's finished
- Bird heads for trees, having to fly
- One tweeting hard-hearted retweet about American hotel
- High-flying singer hurt badly by silence
- Bird not finishing off the fly
- . Heroin and speed found on tense singer
- Spotted flyer in extremely tough attack
- Bird in the cut grass
Buddy explains!

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 THRUSH mean?
THRUSH noun- Any of several species of songbirds of the family Turdidae, often with spotted underbellies such as the bluebird, nightingale, and American robin have.
- A female singer.
- A fungal infection caused by Candida, now especially of the vagina; candidiasis.