It took a turn in forming a link with the Moon (5)
I believe the answer is:
lunik
'it took a turn' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'forming a link with the moon' is the wordplay.
'forming' indicates anagramming the letters.
'with' means one lot of letters goes inside another.
'the moon' becomes 'u' (I can't justify this - if you can you should believe this answer much more).
'link' anagrammed gives 'lnik'.
'lnik' going around 'u' is 'LUNIK'.
'in' is the link.
Can you help me to learn more?
(Another definition for lunik that I've seen is " Soviet moon probe".)