The most common and most likely answer to this crossword clue is the 14 letter word PHILANTHROPIST
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More clues leading to the result PHILANTHROPIST
Buddy explains!
The straight part
We know that "Sponsor" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sponsor = philanthropist.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 PHILANTHROPIST mean?
PHILANTHROPIST noun- A person who loves humankind in general.
- A very generous person or institution.