The most common and most likely answer to this crossword clue is the 8 letter word DISCLAIM
I've seen this crossword clue in The Times
D
I
S
C
L
A
I
M
More clues leading to the result DISCLAIM
- Deny one's opening day allegation
- Reject plate with large design
- Refuse to acknowledge detective’s right
- Renounce record mail shot
- Abandon one consumed by record hit
- Deny detective’s restrained person detaining one
- Reject record hit penning single
- Deny record’s flawed acoustically
- Deny climate’s changing, ignoring note introduced by investigator
- Decline record by mail order
Buddy explains!

The straight part
We know that "Deny" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case deny = disclaim.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 DISCLAIM mean?
DISCLAIM verb- To renounce all claim to; to deny ownership of or responsibility for; to disown; to disavow; to reject.
- To deny, as a claim; to refuse.
- To relinquish or deny having a claim; to disavow another's claim; to decline accepting, as an estate, interest, or office.