The most common and most likely answer to this crossword clue is the 5 letter word MARRY
I've seen this crossword clue in The Guardian
M
A
R
R
Y
More clues leading to the result MARRY
Buddy explains!

The straight part
We know that "wed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case wed = marry.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 MARRY mean?
MARRY verb- To enter into the conjugal or connubial state; to take a husband or a wife.
- (in passive) To be joined to (someone) as spouse according to law or custom.
- To arrange for the marriage of; to give away as wife or husband.
- To take as husband or wife.
- To unite; to join together into a close union.
- To unite in wedlock or matrimony; to perform the ceremony of joining spouses; to bring about a marital union according to the laws or customs of a place.
- To place (two ropes) alongside each other so that they may be grasped and hauled on at the same time.
- To join (two ropes) end to end so that both will pass through a block.
- Indeed!, in truth!; a term of asseveration.