The most common and most likely answer to this crossword clue is the 7 letter word IMPARTS
I've seen this crossword clue in The Guardian
I
M
P
A
R
T
S
Buddy explains!

The straight part
We know that "Passes on" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case passes on = imparts.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 IMPARTS mean?
IMPARTS verb- To give or bestow (e.g. a quality or property).
- To give a part or to share.
- To make known; to show (by speech, writing etc.).
- To hold a conference or consultation.
- To obtain a share of; to partake of.