The most common and most likely answer to this crossword clue is the 6 letter word NUBILE
N
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The straight part
We know that "ready to get married" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ready to get married = nubile.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 NUBILE mean?
NUBILE noun- A young sexually attractive woman.
- Of an age suitable for marriage; marriageable (principally of a young woman).
- Sexually attractive (especially of a young woman).