The most common and most likely answer to this crossword clue is the 7 letter word BANANAS
I've seen this crossword clue in Financial Times
B
A
N
A
N
A
S
More clues leading to the result BANANAS
Buddy explains!

The straight part
We know that "crackers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case crackers = bananas.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 BANANAS mean?
BANANAS noun- An elongated curved tropical fruit that grows in bunches and has a creamy flesh and a smooth skin.
- The tropical tree-like plant which bears clusters of bananas. The plant, usually of the genus Musa but sometimes also including plants from Ensete, has large, elongated leaves and is related to the plantain.
- A yellow colour, like that of a banana's skin.
- (mildly) A person of Asian descent, especially a Chinese American, who has assimilated into Western culture or married a Caucasian (from the "yellow" outside and "white" inside). Compare coconut or Oreo.
- A banana equivalent dose.
- A catamorphism (from the use of banana brackets in the notation).
- The penis.
- A banana kick.
- Crazy, mad, nuts.