The most common and most likely answer to this crossword clue is the 7 letter word STASHED
I've seen this crossword clue in The Guardian
S
T
A
S
H
E
D
More clues leading to the result STASHED
- An outhouse on street is hidden
- 28 Sat out next to hut, hidden away
- Virtuous type has a drop hidden away
- Hidden area in stone outbuilding
- Sat awkwardly with cast hidden away
- Secretly kept stoats regularly in hut
- Reverse parked in bloke’s private space and hid
- Sat back in barn and hid supplies
- Insist, as he dared to keep hidden
- Hidden article in building on street
Buddy explains!

The straight part
We know that "hidden away" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hidden away = stashed.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 STASHED mean?
STASHED verb- To hide or store away for later use.