The most common and most likely answer to this crossword clue is the 3 plus 3 letter word AGE GAP
I've seen this crossword clue in The Guardian
A
G
E
G
A
P
More clues leading to the result AGE GAP
- Such as divides old man and young woman, endlessly arising
- Silver, for example, apparently causing disparity between young and old?
- One scrambled egg followed by a pee, of no consequence to Ronnie Wood?
- Summon Georgia over difficult relationship issue
- Heartlessly asking boy about potential source of misunderstanding
- Difference in years, for example, between a girl’s first and a chap’s last
- Dad’s flipped about scrambled egg — a difference between him and mum?
Buddy explains!
The straight part
We know that "disparity between young and old" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case disparity between young and old = age gap.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.