The most common and most likely answer to this crossword clue is the 5 plus 3 plus 5 letter word SPILL THE BEANS
I've seen this crossword clue in The Times
S
P
I
L
L
T
H
E
B
E
A
N
S
More clues leading to the result SPILL THE BEANS
- Tell everything about the accident in the coffee-house?
- Tell all lighter Greeks to conserve energy
- Accidentally leak article on runners?
- Drop article on vegetables and reveal a secret
- Fall badly beneath shower head and squeal
- Have an accident in the kitchen? Tell all!
- Tip some runners? Tell us!
- Rat’s special hurtful article laid into old city
- What a clumsy chef might do — let slip?
- Stephen Ball is off to sing
Buddy explains!
The straight part
We know that "Tell all" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tell all = spill the beans.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.