The most common and most likely answer to this crossword clue is the 6 letter word DISMAY
I've seen this crossword clue in The Guardian
D
I
S
M
A
Y
More clues leading to the result DISMAY
- Consternation when boy returns with girl
- Might associated with underworld boss causing alarm
- Period in which doctrine is cast down
- Upset with vegetables I had rejected
- Distress as inspector for example crosses motorway
- Detectives have the ability to alarm
- Upset and sad I’m terribly unknown
- Speak ill of ex-PM and cause distress
- Criticise former PM causing alarm
- Apprehension in stock markets, initially within 24 hours
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 DISMAY mean?
DISMAY noun- A sudden or complete loss of courage and firmness in the face of trouble or danger; overwhelming and disabling terror; a sinking of the spirits
- Condition fitted to dismay; ruin.
- To cause to feel apprehension; great sadness, or fear; to deprive of energy
- To render lifeless; to subdue; to disquiet.
- To take dismay or fright; to be filled with dismay.