The most common and most likely answer to this crossword clue is the 7 letter word PONTIFF
I've seen this crossword clue in The Times
P
O
N
T
I
F
F
More clues leading to the result PONTIFF
- Religious leader has power over words
- Pope is quiet concerning argument
- High priest in power working to get over disagreement
- Priest is quiet about squabble
- Church leader and priest close to having difference of opinion
- Churchman with no power over dispute
- High priest‘s power over quarrel
- Religious leader quiet concerning difference of opinion
- Pope and priest working on disagreement
- Avignon had one across – if loud – he opposed the one across in Avignon!
Buddy explains!

The straight part
We know that "Pope" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pope = pontiff.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 PONTIFF mean?
PONTIFF noun- A bishop of the early Church; now specifically, the Pope.
- Any chief figure or leader of a religion.
- A pontifex.