The most common and most likely answer to this crossword clue is the 11 letter word DELIVERANCE
I've seen this crossword clue in The Times
D
E
L
I
V
E
R
A
N
C
E
More clues leading to the result DELIVERANCE
- Relief finding something vital under bottom of aggregate in skip
- Release ball, receiving abuse in return
- Rescue last of fine offal placed in skip
- Receive land when suffering liberation
- A despised revolutionary, basis of Christian church and salvation
- Rescue English organ during caper
- Rescue electronic organ used in social event?
- Release energy on organ in mazurka, perhaps?
- Caper involving revolutionary attack and rescue
Buddy explains!

The straight part
We know that "Release" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case release = deliverance.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 DELIVERANCE mean?
DELIVERANCE noun- Act of delivering or conveying something.
- Delivery in childbirth.
- Extrication from danger, imprisonment, rescue etc.