The most common and most likely answer to this crossword clue is the 12 letter word IMPROVEMENTS
I've seen this crossword clue in The Daily Telegraph
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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 IMPROVEMENTS mean?
IMPROVEMENTS noun- The act of improving; advancement or growth; a bettering
- The act of making profitable use or application of anything, or the state of being profitably employed; practical application, for example of a doctrine, principle, or theory, stated in a discourse.
- The state of being improved; betterment; advance
- Something which is improved
- Increase; growth; progress; advance.
- (in plural) Valuable additions or betterments, for example buildings, clearings, drains, fences, etc., on premises.
- (Patent Laws): A useful addition to, or modification of, a machine, manufacture, or composition.