The most common and most likely answer to this crossword clue is the 5 letter word HUMPS
I've seen this crossword clue in Independent
H
U
M
P
S
Buddy explains!
The straight part
We know that "that camels have" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that camels have = humps.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 HUMPS mean?
HUMPS noun- A mound of earth.
- A deformity in humans caused by abnormal curvature of the upper spine.
- (animals) A rounded fleshy mass, such as on a camel or zebu.
- An act of sexual intercourse.
- (with definite article) A bad mood.
- A painfully boorish person.
- A speed hump.
- A wave that forms in front of an operating hovercraft and impedes progress at low speeds.
- To bend something into a hump.
- To carry (something), especially with some exertion.
- To rhythmically thrust the pelvis in a manner conducive to sexual intercourse
- To prepare for a great exertion; to put forth effort.
- To vex or annoy.
- To shunt wagons / freight cars over the hump in a hump yard.