The most common and most likely answer to this crossword clue is the 8 plus 5 letter word GUARDIAN ANGEL
I've seen this crossword clue in The Daily Telegraph
G
U
A
R
D
I
A
N
A
N
G
E
L
More clues leading to the result GUARDIAN ANGEL
- Unseen helper’s paper and coin no longer used
- In helpful spirit, one financing our competitor?
- Someone to watch over newspaper backer
- A lot of daring language troubled protective figure
- & 23d Caretaker has King and I translated in foreign language
- Financial backer behind newspaper showing protective spirit
- Endlessly daring language rattled protective figure
- Protective figure‘s financier for a rival daily?
Buddy explains!
The straight part
We know that "Someone to watch over" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case someone to watch over = guardian angel.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.