The most common and most likely answer to this crossword clue is the 6 plus 4 letter word EDWARD LEAR
I've seen this crossword clue in Financial Times
E
D
W
A
R
D
L
E
A
R
More clues leading to the result EDWARD LEAR
- Two kings who revelled in nonsense?
- Humorist in the red, upset about raw deal, perhaps
- He wrote senselessly to harass leader governing electoral area
- Author of 2 Kings
- Artist led shakily around hospital section, getting attention
- Poet’s shifty dealer hangs around part of a hospital
- Editor fighting over line retained by precious poet
- Artist‘s teddy bear ultimately charcoal rather than black
Buddy explains!
The straight part
We know that "who revelled in nonsense" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case who revelled in nonsense = edward lear.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.