The most common and most likely answer to this crossword clue is the 12 letter word RESPONSORIAL
R
E
S
P
O
N
S
O
R
I
A
L
Buddy explains!
The straight part
We know that "description of psalm in church?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case description of psalm in church? = responsorial.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 RESPONSORIAL mean?
RESPONSORIAL noun- A book of liturgical responses
- Of or pertaining to a response (in all senses)
- Responsive