One standing at the end of a mast, swinging lantern-case around (4,3)

'one standing at the end' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'a mast swinging lantern-case around' is the wordplay.
'swinging' indicates an anagram.
'case' means to remove the middle letters.
'around' means one lot of letters goes inside another.
'lantern' with its centre removed is 'ln'.
'a'+'mast'='amast'
'amast' anagrammed gives 'astma'.
'astma' inserted into 'ln' is 'LAST MAN'.

'of' acts as a link.

Can you help me to learn more?