The most common and most likely answer to this crossword clue is the 9 letter word APOLOGISE
I've seen this crossword clue in The Guardian
A
P
O
L
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More clues leading to the result APOLOGISE
- Brute concealing old record is to put things straight
- After game soldiers in casualty say sorry
- Show remorse having put mint in sage I chopped up
- Justify a record in composure
- Make a sorry speech?
- Say sorry when logo is misprinted in copy
- Regret blurred polo images cutting out mare’s head
- A loose pig tortured? Say 'Sorry!'
- Beg pardon: soldier in a game’s on methamphetamine?
Buddy explains!
The straight part
We know that "Show remorse" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case show remorse = apologise.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 APOLOGISE mean?
APOLOGISE verb- (often followed by “for”) To make an apology or excuse; to acknowledge some fault or offense, with expression of regret for it, by way of amends
- To express regret that a certain event has occurred.
- To make an apologia or defense; to act as apologist.