The most common and most likely answer to this crossword clue is the 8 letter word MATURITY
I've seen this crossword clue in Independent
M
A
T
U
R
I
T
Y
More clues leading to the result MATURITY
Buddy explains!
The straight part
We know that "age" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case age = maturity.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 MATURITY mean?
MATURITY noun- The state of being mature, ready or ripe.
- When bodily growth has completed and/or reproduction can begin.
- The state of a debt obligation at the end of the term of maturation thereof, once all interest and any applicable fees have accrued to the principal.
- Date when payment is due.