Cryptic crossword clue
First of rockets in space travelling an astronomical distance 6

The most common and most likely answer to this crossword clue is the 6 letter word PARSEC

P
A
R
S
E
C


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The straight part
We know that "an astronomical distance" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case an astronomical distance = parsec.
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 PARSEC mean?

PARSEC noun
  1. Parallax second

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