The most common and most likely answer to this crossword clue is the 7 letter word GAGARIN
I've seen this crossword clue in The Times
G
A
G
A
R
I
N
More clues leading to the result GAGARIN
- Keen to call short cosmonaut
- Out of this world Soviet jelly dipped in alcohol
- Pioneering Russian paper set up in advance
- Long-distance traveller’s advantage – importing paper on return
- Noted Soviet from Georgia represented in rag
- In spirit, the stuff feeding culture for an adventurer
- Cosmonaut runs into acceleration due to gravity once more
- Traveller in new enterprise wildly enthusiastic, one recruited by the navy
- High-flier from Russia or Georgia with mobile I rang
- Old space traveller encounters gravity, runs in again
Buddy explains!
The straight part
We know that "Out of this world Soviet" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case out of this world soviet = gagarin.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.