The most common and most likely answer to this crossword clue is the 9 letter word SEGMENTAL
I've seen this crossword clue in The Times
S
E
G
M
E
N
T
A
L
Buddy explains!

The straight part
We know that "Like some worms" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case like some worms = segmental.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 SEGMENTAL mean?
SEGMENTAL adjective- Of, relating to, or constructed from segments