The most common and most likely answer to this crossword clue is the 5 letter word TWINS
I've seen this crossword clue in The Guardian
T
W
I
N
S
More clues leading to the result TWINS
Buddy explains!

The straight part
We know that "Jedward?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case jedward? = twins.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 TWINS mean?
TWINS noun- Either of two people (or, less commonly, animals) who shared the same uterus at the same time; one who was born at the same birth as a sibling.
- Either of two similar or closely related objects, entities etc.
- A room in a hotel, guesthouse, etc. with two beds; a twin room.
- A twin size mattress or a bed designed for such a mattress.
- A twin crystal.
- (obsolete outside Scotland) To separate, divide.
- (obsolete outside Scotland) To split, part; to go away, depart.
- (usually in the passive) To join, unite; to form links between (now especially of two places in different countries).
- To be paired or suited.
- To give birth to twins.
- To be born at the same birth.
- A woman's breasts