The most common and most likely answer to this crossword clue is the 5 letter word AILED
I've seen this crossword clue in Financial Times
A
I
L
E
D
More clues leading to the result AILED
- Felt bad, being unsuccessful in ousting leader
- Suffered from a charcuterie upset?
- Troubled when TV cook returns
- Ladies’ pants – not seconds – had been made poorly
- After the end of Zumba, I ran and was sick
- Controlled by software, evidently upset
- Troubled the French to get help outside
- Heading out, travelled by boat and became sick
- A place selling cheese in turn got in a bad way
- Felt pain, cracking watch display
Buddy explains!

The straight part
We know that "Felt pain" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case felt pain = ailed.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 AILED mean?
AILED verb- To cause to suffer; to trouble, afflict. (Now chiefly in interrogative or indefinite constructions.)
- To be ill; to suffer; to be troubled.