The most common and most likely answer to this crossword clue is the 9 letter word CHEAPENED
I've seen this crossword clue in The Daily Telegraph
C
H
E
A
P
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D
More clues leading to the result CHEAPENED
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 CHEAPENED mean?
CHEAPENED verb- To decrease the value of; to make cheap
- To make vulgar
- To become cheaper
- To bargain for, ask the price of.