The most common and most likely answer to this crossword clue is the 6 plus 3 letter word COMMON ERA
I've seen this crossword clue in The Guardian
C
O
M
M
O
N
E
R
A
More clues leading to the result COMMON ERA
- I run in, this time
- ’Spare mo’ with Cameron? It’s lasted centuries
- Romance rudely interrupted by… JIFFY AD!
- These days, answer to no lord
- These days a non-royal takes precedence
- These days may be more frequent before the start of autumn
- Period drama’s central character subjected to no peer pressure
- Moron came to waste our time
- Cameron out to gain honour in our time
- These days may be more prevalent before the start of autumn
Buddy explains!
The straight part
We know that "AD" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ad = common era.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.