The most common and most likely answer to this crossword clue is the 6 plus 1 letter word EDIBLE -
E
D
I
B
L
E
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Buddy explains!

The straight part
We know that "eatable" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case eatable = edible -.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 EDIBLE - mean?
EDIBLE - noun- Anything edible.
- (marijuana) a foodstuff, usually a baked good, infused with tetrahydrocannabinol from cannabutter etc.
- That can be eaten without harm; innocuous to humans; suitable for consumption.
- That can be eaten without disgust.