The most common and most likely answer to this crossword clue is the 3 letter word ROO
I've seen this crossword clue in Independent
R
O
O
More clues leading to the result ROO
- Animal that jumps in river with two ducks
- Small marsupial tailed black bird
- Aussie native king banished from castle?
- Aussie native requiring a lot of space
- Criminal losing case, the bounder
- Australian native’s short space
- Bounder deposing the king of the castle
- Aussie jumper ducks under bottom of bar
- Short man in small jumper
- Little jumper’s not enough space?
Buddy explains!

The straight part
We know that "&lit-ish/double defn.?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case &lit-ish/double defn.? = roo.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 ROO mean?
ROO noun- Peace; quietness.
- Rest; stillness.
- A member of the Macropodidae family of large marsupials with strong hind legs for hopping, native to Australia.
- A hooded jacket with a front pocket, usually of fleece material, a kangaroo jacket.