The most common and most likely answer to this crossword clue is the 7 letter word UNFROCK
I've seen this crossword clue in The Daily Telegraph
U
N
F
R
O
C
K
More clues leading to the result UNFROCK
- Take clothing off, having kinky fun with popular music
- Take vestments off – fantastic fun – groove to the music!
- Ruin fun and stagger, showing force out of habit
- Remove priest making a Continental congregation change hands
- Give the sack to a priest, outcome of fun and beat music?
- Make a priest give up his habit?
Buddy explains!

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 UNFROCK mean?
UNFROCK verb- To remove from the clergy; to revoke the clergical status of.