The most common and most likely answer to this crossword clue is the 8 letter word NORSEMEN
N
O
R
S
E
M
E
N
More clues leading to the result NORSEMEN
- Vikings seem excited with goddess coming round
- Scandinavians note equestrian chaps, heading off
- . Finally open to offer: seed for Scandinavians
- Scandinavians name equestrians lacking aspiration
- Invaders in North or South Yemen deposing leader
- Any number of riders, unled invaders
- Invaders formerly from North or South Yemen decapitated
- Riders head off for Northern Vikings
- Note riders heading off invaders as before
Buddy explains!

The straight part
We know that "Vikings" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vikings = norsemen.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.