The most common and most likely answer to this crossword clue is the 9 letter word RENT-FREE
I've seen this crossword clue in Financial Times
R
E
N
T
-
F
R
E
E
More clues leading to the result RENT-FREE
Buddy explains!

The straight part
We know that "No tears tenancy agreement" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case no tears tenancy agreement = rent-free.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 RENT-FREE mean?
RENT-FREE adjective- On which no rent is payable.
- Without paying rent.