The most common and most likely answer to this crossword clue is the 13 plus 1 letter word DELIBERATIVE} –
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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.
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What does DELIBERATIVE} – mean?
DELIBERATIVE} – noun- A discourse in which a question is discussed, or weighed and examined.
- A kind of rhetoric employed in proving a thing and convincing others of its truth, in order to persuade them to adopt it.
- That deliberates, considers carefully.