One who disappeared in grinding lunar cold (4,5)
I believe the answer is:
lord lucan
'one who disappeared' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'grinding lunar cold' is the wordplay.
'grinding' indicates anagramming the letters (letters must be ground into a new form).
'lunar'+'cold'='lunarcold'
'lunarcold' is an anagram of 'LORD LUCAN'.
'in' acts as a link.
Can you help me to learn more?
(Another definition for lord lucan that I've seen is " Missing man".)