The most common and most likely answer to this crossword clue is the 5 letter word SLING
I've seen this crossword clue in Financial Times
S
L
I
N
G
More clues leading to the result SLING
- Toss first of seals fish
- Shy, having injured arm in this?
- Heather after second alcoholic drink
- Sort of drink — celebrate, imbibing litre
- Supporter providing sweetened drink
- Society getting Heather’s support
- Sons standing by Heather for support
- Chuck Norris at last meets swimmer
- Section for pa in fence of stakes – it rings flocks
- Toss medical support
Buddy explains!

The straight part
We know that "support" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case support = sling.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 SLING mean?
SLING noun- An instrument for throwing stones or other missiles, consisting of a short strap with two strings fastened to its ends, or with a string fastened to one end and a light stick to the other.
- A kind of hanging bandage put around the neck, in which a wounded arm or hand is supported.
- A loop of cloth, worn around the neck, for supporting a baby or other such load.
- A loop of rope, or a rope or chain with hooks, for suspending a barrel, bale, or other heavy object, in hoisting or lowering.
- A strap attached to a firearm, for suspending it from the shoulder.
- (chiefly in the plural) A band of rope or iron for securing a yard to a mast.
- The act or motion of hurling as with a sling; a throw; figuratively, a stroke.
- A loop of rope or fabric tape used for various purposes: e.g. as part of a runner, or providing extra protection when abseiling or belaying.
- A drink composed of a spirit (usually gin) and water sweetened.
- To throw with a circular or arcing motion.
- To throw with a sling.
- To pass a rope around (a cask, gun, etc.) preparatory to attaching a hoisting or lowering tackle.
- To sell, peddle, or distribute illicitly (e.g. drugs, sex, etc.).
- A young or infant spider, such as one raised in captivity.