The most common and most likely answer to this crossword clue is the 7 letter word TRUSTEE
I've seen this crossword clue in The Daily Telegraph
T
R
U
S
T
E
E
More clues leading to the result TRUSTEE
- Good man retained by loyal English manager
- Set out to break honest administrator
- Decay in support for adminstrator
- Guardian essentially loathes Republican with American support
- Set out to stop honest administrator
- Lack of practice in support for responsible person
- Renovated street around university — one might be in charge of all the property
- Administrator needs support, having become dull inside
- ‘Guardian‘ accurately contains most of issue
- UT stree made legal guardian
Buddy explains!

The straight part
We know that "one might be in charge of all the property" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one might be in charge of all the property = trustee.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 TRUSTEE mean?
TRUSTEE noun- A person to whom property is legally committed in trust, to be applied either for the benefit of specified individuals, or for public uses; one who is intrusted with property for the benefit of another.
- A person in whose hands the effects of another are attached in a trustee process.
- To commit (property) to the care of a trustee.
- To attach (a debtor's wages, credits, or property in the hands of a third person) in the interest of the creditor.