The most common and most likely answer to this crossword clue is the 6 letter word STORED
I've seen this crossword clue in The Guardian
S
T
O
R
E
D
More clues leading to the result STORED
- Kept being annoyed about time taken by duke
- Moved to cellar, say, to put in second kind of wine
- Kept touring Dorset
- Son gets rent daughter put aside
- Sorted out and put away
- Kept raising points about school subject
- Put aside shilling given to communist
- Sorted, resorted and stocked
- Kept destroyers at sea, to start with
- What’s kept by journalist or editor and filed?
Buddy explains!
The straight part
We know that "not on public display" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not on public display = stored.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 STORED mean?
STORED verb- To keep (something) while not in use, generally in a place meant for that purpose.
- To write (something) into memory or registers.